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Zornoza Moreno M, Pérez-Martín J, Robles Mañueco M. Parents and teachers' perspectives on a school-located influenza vaccination program: A pilot study in the Region of Murcia, Spain. Hum Vaccin Immunother 2024; 20:2328406. [PMID: 38573783 PMCID: PMC10996829 DOI: 10.1080/21645515.2024.2328406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/06/2024] [Indexed: 04/06/2024] Open
Abstract
During the 2022-2023 season, the Region of Murcia (an autonomous community of Spain) introduced the influenza vaccination campaign in children aged 24-59 months with the live-attenuated influenza nasal spray vaccine. To expand coverage, a pilot study was conducted to include the 3- to 4-year population in 24 public schools. The aim of the study was to assess the experiences of parents and teachers involved in the project. This was a psychosocial qualitative study in which information was collected from a cohort of 23 parents and 17 teachers who attended three and two focus group sessions, respectively. A high degree of satisfaction with the school-located influenza vaccination program was consistently reported. The teachers reported creating a friendly environment and acting as companions to support children in the absence of their parents. They also considered the intranasal route, which avoids intramuscular puncture, as a facilitating element that turned the vaccination process into a kind of game. Parents emphasized the importance of vaccination to protect their children, and secondarily, to ensure protection of the family nucleus. Some parents who had their children already vaccinated in the health care center reported preference for the school setting, probably selecting this option in the future. The availability of school-based influenza vaccination promoted greater equity in accessing the vaccine and facilitated family reconciliation. To optimize coverage and minimize potential reluctance, providing the necessary information to parents both before and after vaccination was considered. School-located influenza vaccination was feasible and is a valuable strategy to be implemented in future campaigns.
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Affiliation(s)
- Matilde Zornoza Moreno
- Health Prevention and Protection Service, General Directorate of Public Health and Addictions, Health Council, Region de Murcia, Spain
| | - Jaime Pérez-Martín
- Health Prevention and Protection Service, General Directorate of Public Health and Addictions, Health Council, Region de Murcia, Spain
| | - Marta Robles Mañueco
- Immunotherapy and Vaccines Unit, AstraZeneca Farmacéutica Spain SA, Medical Department, Madrid, Spain
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O’Leary ST, Campbell JD, Ardura MI, Bryant KA, Caserta MT, Espinosa C, Frenck RW, Healy CM, John CC, Kourtis AP, Milstone A, Myers A, Pannaraj P, Ratner AJ, Bryant KA, Hofstetter AM, Chaparro JD, Michel JJ, Kimberlin DW, Banerjee R, Barnett ED, Lynfield R, Sawyer MH, Barton-Forbes M, Cardemil CV, Farizo KM, Kafer LM, Moore D, Okeke C, Prestel C, Patel M, Starke JR, Thompson J, Torres JP, Wharton M, Woods CR, Gibbs G. Recommendations for Prevention and Control of Influenza in Children, 2024-2025: Policy Statement. Pediatrics 2024; 154:e2024068507. [PMID: 39183669 DOI: 10.1542/peds.2024-068507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 07/26/2024] [Accepted: 07/26/2024] [Indexed: 08/27/2024] Open
Abstract
This statement updates the recommendations of the American Academy of Pediatrics for the routine use of influenza vaccines and antiviral medications in the prevention and treatment of influenza in children during the 2024-2025 influenza season. A detailed review of the evidence supporting these recommendations is published in the accompanying technical report (www.pediatrics.org/cgi/doi/10.1542/peds.2024-068508). The American Academy of Pediatrics recommends annual influenza vaccination of all children without medical contraindications starting at 6 months of age. Children are at risk for hospitalization and death from influenza. Influenza vaccination is an important strategy for protecting children and the broader community as well as reducing the overall burden of respiratory illnesses when other viruses are cocirculating. Any licensed influenza vaccine appropriate for age and health status can be administered, ideally as soon as possible in the season, without preference for one product or formulation over another. All licensed influenza vaccines for use in the United States are trivalent for the 2024-2025 influenza season. Antiviral treatment of influenza is recommended for children with suspected (eg, influenza-like illness [fever with either cough or sore throat]) or confirmed influenza who are hospitalized or have severe or progressive disease or have underlying conditions that increase their risk of complications of influenza, regardless of duration of illness. Antiviral treatment should be initiated as soon as possible. Antiviral treatment may be considered in the outpatient setting for symptomatic children who are not at high risk for influenza complications with suspected or confirmed influenza disease, if treatment can be initiated within 48 hours of illness onset. Antiviral treatment may also be considered for children with suspected or confirmed influenza disease whose siblings or household contacts either are younger than 6 months or have a high-risk condition that predisposes them to complications of influenza. Antiviral chemoprophylaxis is recommended for the prevention of influenza virus infection as an adjunct to vaccination in certain individuals, especially exposed children who are asymptomatic and are at high risk for influenza complications but have not yet been immunized or those who are not expected to mount an effective immune response.
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Lopes H, Baptista-Leite R, Hermenegildo C, Atun R. Digital Gamification Tool (Let's Control Flu) to Increase Vaccination Coverage Rates: Proposal for Algorithm Development. JMIR Res Protoc 2024; 13:e55613. [PMID: 39255031 PMCID: PMC11422745 DOI: 10.2196/55613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/27/2024] [Accepted: 06/20/2024] [Indexed: 09/11/2024] Open
Abstract
BACKGROUND Influenza represents a critical public health challenge, disproportionately affecting at-risk populations, including older adults and those with chronic conditions, often compounded by socioeconomic factors. Innovative strategies, such as gamification, are essential for augmenting risk communication and community engagement efforts to address this threat. OBJECTIVE This study aims to introduce the "Let's Control Flu" (LCF) tool, a gamified, interactive platform aimed at simulating the impact of various public health policies (PHPs) on influenza vaccination coverage rates and health outcomes. The tool aligns with the World Health Organization's goal of achieving a 75% influenza vaccination rate by 2030, facilitating strategic decision-making to enhance vaccination uptake. METHODS The LCF tool integrates a selection of 13 PHPs from an initial set proposed in another study, targeting specific population groups to evaluate 7 key health outcomes. A prioritization mechanism accounts for societal resistance and the synergistic effects of PHPs, projecting the potential policy impacts from 2022 to 2031. This methodology enables users to assess how PHPs could influence public health strategies within distinct target groups. RESULTS The LCF project began in February 2021 and is scheduled to end in December 2024. The model creation phase and its application to the pilot country, Sweden, took place between May 2021 and May 2023, with subsequent application to other European countries. The pilot phase demonstrated the tool's potential, indicating a promising increase in the national influenza vaccination coverage rate, with uniform improvements across all targeted demographic groups. These initial findings highlight the tool's capacity to model the effects of PHPs on improving vaccination rates and mitigating the health impact of influenza. CONCLUSIONS By incorporating gamification into the analysis of PHPs, the LCF tool offers an innovative and accessible approach to supporting health decision makers and patient advocacy groups. It enhances the comprehension of policy impacts, promoting more effective influenza prevention and control strategies. This paper underscores the critical need for adaptable and engaging tools in PHP planning and implementation. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) RR1-10.2196/55613.
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Affiliation(s)
- Henrique Lopes
- NOVA Center for Global Health, NOVA Information Management School, Universidade Nova de Lisboa, Lisbon, Portugal
| | - Ricardo Baptista-Leite
- NOVA Center for Global Health, NOVA Information Management School, Universidade Nova de Lisboa, Lisbon, Portugal
- Department of International Health, Care and Public Health Research Institute, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, Netherlands
| | - Catarina Hermenegildo
- NOVA Center for Global Health, NOVA Information Management School, Universidade Nova de Lisboa, Lisbon, Portugal
| | - Rifat Atun
- Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, United States
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Shi Y, Xu L, Jiang H, Cai Y, Bao C, Liu W. Analysis of factors influencing influenza outbreaks in schools in Taicang City, China. Front Public Health 2024; 12:1409004. [PMID: 39100958 PMCID: PMC11294167 DOI: 10.3389/fpubh.2024.1409004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 07/08/2024] [Indexed: 08/06/2024] Open
Abstract
Objective This study aims to analyze the awareness of influenza prevention and control and the behavioral attitudes toward the work among parents and staff in schools in Taicang City and the impact of the vaccination rate among students on influenza outbreaks in schools. The findings can provide references for the development of effective control strategies for the spread of influenza. Methods An anonymous questionnaire survey was conducted on 10,962 students from 20 schools in Taicang City, with class as the unit of analysis. The survey investigated their awareness of influenza prevention and control, their attitudes, and the vaccination coverage. Results From January to June 2023, a total of 388 influenza outbreaks were reported in schools in Taicang City, involving 77 schools. There were 3,475 confirmed cases, with an average infection rate of 18.53%. In schools where influenza outbreaks had occurred, the incidence rate of those who received influenza vaccine was significantly lower than those who did not, and the vaccine protection rate was 28.22%. The knowledge awareness rates of "the main transmission routes of influenza" and "influenza vaccination can prevent influenza" among parents of students were 95.49 and 93.16%, respectively. The differences between schools involved in the epidemic and non-epidemic were statistically significant (p < 0.05). The correct attitudes of parents toward "actively reporting relevant symptoms to teachers when their children show symptoms" and "avoiding classes with diseases when their children are suspected to be sick" are 98.80 and 96.26%, respectively. The differences between schools with and without epidemic are statistically significant (p < 0.05). The correct attitudes of the class teacher toward "correct management and control of students with flu like symptoms in the class" and "taking correct prevention and control measures in the event of a flu epidemic in the class" were 89.36 and 92.55%, respectively. The differences between epidemic related and non-epidemic related classes were statistically significant (p < 0.05). Conclusion Enhance the knowledge level of influenza prevention and control among parents of students, Strengthening the training for class teachers in emergency response to infectious diseases and increasing vaccination coverage among students can effectively reduce the incidence of influenza and thereby the occurrence of cluster outbreaks in schools.
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Affiliation(s)
- Yao Shi
- Taicang City Centre for Disease Control and Prevention, Suzhou, Jiangsu, China
- Jiangsu Field Epidemiology Training Program, Jiangsu Provincial Centre for Disease Control and Prevention, Nanjing, Jiangsu, China
| | - Lei Xu
- Taicang City Centre for Disease Control and Prevention, Suzhou, Jiangsu, China
| | - Hai Jiang
- Taicang City Centre for Disease Control and Prevention, Suzhou, Jiangsu, China
| | - Yongbin Cai
- Taicang City Centre for Disease Control and Prevention, Suzhou, Jiangsu, China
| | - Changjun Bao
- Jiangsu Provincial Centre for Disease Control and Prevention, Jiangsu Institution of Public Health, Nanjing, Jiangsu, China
| | - Wendong Liu
- Jiangsu Provincial Centre for Disease Control and Prevention, Jiangsu Institution of Public Health, Nanjing, Jiangsu, China
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Pérez-Martín JJ, Iofrío de Arce A, Zornoza-Moreno M. The Attitudes of Healthcare Professionals in an Autonomous Community in Spain towards Paediatric Influenza Vaccination. Vaccines (Basel) 2024; 12:599. [PMID: 38932329 PMCID: PMC11209165 DOI: 10.3390/vaccines12060599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/21/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
In the 2022-2023 influenza season, three autonomous communities anticipated the document approved by the Public Health Commission recommending influenza vaccination for all children aged 6 to 59 months. The primary objective of this study was to evaluate the attitude of healthcare professionals towards the first universal vaccination campaign in our region, as well as the acceptability of the vaccines used and their attitude towards pilot school vaccination. This was a cross-sectional, survey-based, descriptive study. All healthcare professionals involved in the campaign were invited to participate. Overall, 91.9% of surveyed professionals thought that influenza vaccination from 6 to 59 months was important or very important, and 89.8% had previous experience regarding the intramuscular vaccine. Healthcare professionals rated the intranasal vaccine significantly more positively, but there were no differences when asking about each vaccine without comparison. The inhaled vaccine was preferred by 97.5% for the following campaign. Pilot school vaccination had a 75% acceptance rate. The inhaled vaccine was preferred by most professionals, and pilot school vaccination was highly accepted and independently associated with the importance of vaccination as considered by physicians, being a medical doctor, and participation in the pilot programme.
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Affiliation(s)
- Jaime J. Pérez-Martín
- Prevention and Health Protection Service, Regional Ministry of Health, Ronda de Levante, 11, 30008 Murcia, Spain;
| | - Antonio Iofrío de Arce
- Murcia-El Ranero Primary Care Centre, Murcia Health Service, Paseo Duques de Lugo, 30009 Murcia, Spain;
| | - Matilde Zornoza-Moreno
- Prevention and Health Protection Service, Regional Ministry of Health, Ronda de Levante, 11, 30008 Murcia, Spain;
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Hu Y, Yan R, Yin X, Gong E, Xin X, Gao A, Shi X, Wang J, Xue H, Feng L, Zhang J. Effectiveness of Multifaceted Strategies to Increase Influenza Vaccination Uptake: A Cluster Randomized Trial. JAMA Netw Open 2024; 7:e243098. [PMID: 38526493 PMCID: PMC10964116 DOI: 10.1001/jamanetworkopen.2024.3098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/26/2024] [Indexed: 03/26/2024] Open
Abstract
Importance Influenza vaccination rates remain low among primary school students and vary by school in Beijing, China. Theory-informed, multifaceted strategies are needed to improve influenza vaccination uptake. Objective To evaluate the effectiveness of multifaceted strategies in improving influenza vaccination uptake among primary school students. Design, Setting, and Participants This cluster randomized trial was conducted from September 2022 to May 2023 across primary schools in Beijing, China. Schools were allocated randomly in a 1:1 ratio to multifaceted strategies or usual practice. Schools were deemed eligible if the vaccination rates in the 2019 to 2020 season fell at or below the district-wide average for primary schools. Eligible participants included students in grades 2 and 3 with no medical contraindications for influenza vaccination. Intervention The multifaceted strategies intervention involved system-level planning and coordination (eg, developing an implementation blueprint, building social norms, and enhancing supervision), school-level training and educating school implementers (eg, conducting a 1-hour training and developing educational materials), and individual-level educating and reminding students and parents (eg, conducting educational activities and sending 4 reminders about vaccination). Main Outcomes and Measures The primary outcomes were influenza vaccination uptake at school reported by school clinicians as well as overall vaccine uptake either at school or outside of school as reported by parents at 3 months. Generalized linear mixed models were used for analysis. Results A total of 20 schools were randomized. One intervention school and 2 control schools did not administer vaccination on school grounds due to COVID-19, resulting in a total of 17 schools (9 intervention and 8 control). There was a total of 1691 students aged 7 to 8 years (890 male [52.6%]; 801 female [47.4%]) including 915 in the intervention group and 776 in the control group. Of all participants, 848 (50.1%) were in grade 2, and 1209 (71.5%) were vaccinated in the 2021 to 2022 season. Participants in the intervention and control groups shared similar characteristics. At follow-up, of the 915 students in the intervention group, 679 (74.5%) received a vaccination at school, and of the 776 students in the control group, 556 (71.7%) received a vaccination at school. The overall vaccination rates were 76.0% (695 of 915 students) for the intervention group and 71.3% (553 of 776 students) for the control group. Compared with the control group, there was significant improvement of vaccination uptake at school (odds ratio, 1.40; 95% CI, 1.06-1.85; P = .02) and overall uptake (odds ratio, 1.49; 95% CI, 1.12-1.99; P = .01) for the intervention group. Conclusions and Relevance In this study, multifaceted strategies showed modest effectiveness in improving influenza vaccination uptake among primary school students, which provides a basis for the implementation of school-located vaccination programs of other vaccines in China, and in other countries with comparable programs. Trial registration Chinese Clinical Trial Registry: ChiCTR2200062449.
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Affiliation(s)
- Yiluan Hu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Ruijie Yan
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xuejun Yin
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- The George Institute for Global Health, University of New South Wales, Newtown, New South Wales, Australia
| | - Enying Gong
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xin Xin
- Faculty of Psychology, Beijing Normal University, Beijing, China
| | - Aiyu Gao
- Dongcheng Primary and Secondary School Health Care Center, Beijing, China
| | - Xiaoyan Shi
- Dongcheng Primary and Secondary School Health Care Center, Beijing, China
| | - Jing Wang
- Department of Infectious Disease, Dongcheng Center for Disease Control and Prevention, Beijing, China
| | - Hao Xue
- Stanford Center on China’s Economy and Institutions, Stanford University, Stanford, California
| | - Luzhao Feng
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Juan Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- Research Unit of Population Health, Faculty of Medicine, University of Oulu, Oulu, Finland
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Yan R, Yin X, Hu Y, Wang H, Sun C, Gong E, Xin X, Zhang J. Identifying implementation strategies to address barriers of implementing a school-located influenza vaccination program in Beijing. Implement Sci Commun 2023; 4:123. [PMID: 37821918 PMCID: PMC10566160 DOI: 10.1186/s43058-023-00501-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 09/06/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND The school-located influenza vaccinations (SLIV) can increase influenza vaccination and reduce influenza infections among school-aged children. However, the vaccination rate has remained low and varied widely among schools in Beijing, China. This study aimed to ascertain barriers and facilitators of implementing SLIV and to identify implementation strategies for SLIV quality improvement programs in this context. METHODS Semi-structured interviews were conducted with diverse stakeholders (i.e., representatives of both the Department of Health and the Department of Education, school physicians, class headteachers, and parents) involved in SLIV implementation. Participants were identified by purposive and snowball sampling. The Consolidated Framework for Implementation Research was adopted to facilitate data collection and analysis. Themes and subthemes regarding barriers and facilitators were generated using deductive and inductive approaches. Based on the Consolidated Framework for Implementation Research-Expert Recommendations for Implementing Change (CFIR-ERIC) matching tool, practical implementation strategies were proposed to address the identified barriers of SLIV delivery. RESULTS Twenty-four participants were interviewed. Facilitators included easy access to SLIV, clear responsibilities and close collaboration among government sectors, top-down authority, integrating SLIV into the routine of schools, and priority given to SLIV. The main barriers were parents' misconception, inefficient coordination for vaccine supply and vaccination dates, the lack of planning, and inadequate access to knowledge and information about the SLIV. CFIR-ERIC Matching tool suggested implementation strategies at the system (i.e., developing an implementation blueprint, and promoting network weaving), school (i.e., training and educating school implementers), and consumer (i.e., engaging students and parents) levels to improve SLIV implementation. CONCLUSIONS There were substantial barriers to the delivery of the SLIV program. Theory-driven implementation strategies developed in this pre-implementation study should be considered to address those identified determinants for successful SLIV implementation.
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Affiliation(s)
- Ruijie Yan
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
| | - Xuejun Yin
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
- The George Institute for Global Health, University of New South Wales, Sydney, NSW 2052 Australia
| | - Yiluan Hu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
| | - Huan Wang
- Faculty of Psychology, Beijing Normal University, Beijing, 100875 China
| | - Chris Sun
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
| | - Enying Gong
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
| | - Xin Xin
- Faculty of Psychology, Beijing Normal University, Beijing, 100875 China
| | - Juan Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100730 China
- Research Unit of Population Health, Faculty of Medicine, University of Oulu, 5000 Oulu, Finland
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Amendola A, Borghi E, Bianchi S, Gori M, Fappani C, Barcellini L, Forlanini F, Garancini N, Nava C, Mari A, Sala A, Gasparini C, Ottaviano E, Colzani D, Biganzoli EM, Tanzi E, Zuccotti GV. Preschool-located influenza vaccination and influenza-like illness surveillance: an Italian pilot experience. Ital J Pediatr 2023; 49:91. [PMID: 37480047 PMCID: PMC10362647 DOI: 10.1186/s13052-023-01481-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 06/01/2023] [Indexed: 07/23/2023] Open
Abstract
BACKGROUND We describe the first school-located influenza vaccination campaign with quadrivalent live-attenuated influenza vaccine (LAIV) among pre-school children in Italy, coupled with an innovative school-centred influenza-like illnesses (ILIs) surveillance using a self-sampling non-invasive saliva collection method. METHODS The pilot study was proposed during the 2021/2022 influenza season to fifteen pre-schools in the Milan municipality. LAIV was offered directly in school to all healthy children without contraindications. ILI differential diagnosis was conducted by real-time RT-PCR for influenza A/B and SARS-CoV-2. RESULTS Five pre-schools were involved in the pilot project and overall, 135 families (31.2%) participated in the study, adhering to both surveillance and vaccination; 59% of families had an immigrant background. No pupil experienced adverse reactions after vaccination. Nineteen saliva samples were collected from sixteen children (11.8%). Six samples (31.6%) tested positive for SARS-CoV-2; none was positive for influenza A/B. CONCLUSIONS The participation in the immunisation campaign was good, considering possible absences due to COVID-19 pandemic, and the intranasal administration was well tolerated and helped to overcome parental hesitancy. Saliva sampling represented a useful tool to reduce children's stress and increase parents' compliance. The high participation of families with an immigrant background suggests that school-based interventions can represent an effective strategy to overcome socioeconomic and cultural barriers.
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Affiliation(s)
- Antonella Amendola
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy.
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy.
| | - Elisa Borghi
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
| | - Silvia Bianchi
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
| | - Maria Gori
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
| | - Clara Fappani
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, 20133, Italy
| | - Lucia Barcellini
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Federica Forlanini
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Nicolò Garancini
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Chiara Nava
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Alessandra Mari
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Anna Sala
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Chiara Gasparini
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
| | - Emerenziana Ottaviano
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
| | - Daniela Colzani
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
| | - Elia Mario Biganzoli
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, Milan, 20157, Italy
| | - Elisabetta Tanzi
- Department of Health Sciences, Università degli Studi di Milano, Milan, 20142, Italy
- EpiSoMI CRC-Coordinated Research Centre, Università degli Studi di Milano, Milan, 20133, Italy
| | - Gian Vincenzo Zuccotti
- Department of Pediatrics, V. Buzzi Children's Hospital, Università degli Studi di Milano, Milan, 20154, Italy
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Wilson OF, Mote SL, Morse BL. Addressing Vaccine Hesitancy Among Students and Families: Interventions for School Nurses. NASN Sch Nurse 2023; 38:146-154. [PMID: 35786090 DOI: 10.1177/1942602x221106945] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Vaccine hesitance is a public health issue that school nurses often address in practice. It has become even more prevalent during the coronavirus disease 2019 (COVID-19) pandemic. Vaccine compliance among schoolchildren is essential to the health of an entire community, given that many pediatric illnesses are vaccine-preventable. School nurses are involved in the promotion of vaccines in a school district, as they provide health education to students and families and are responsible for vaccine surveillance. Promoting vaccine compliance as a matter of public health can be challenging for school nurses, especially if a community holds strong beliefs regarding the necessity of pediatric vaccines. This article reviews the history of vaccine mandates, addresses challenges associated with vaccine compliance, and provides interventions school nurses can use when providing care to students and families regarding vaccine hesitancy. In following the nursing process, a school nurse is able to identify students missing vaccine(s) and evaluate for hesitancy, before implementing interventions that provide education to students and families. Several cost-efficient and accessible interventions can facilitate effective education and promote vaccine compliance. School nurses can forge trusting relationships and engage in compassionate dialogue to support vaccine compliance in the school.
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Affiliation(s)
- Olivia F Wilson
- Solomont School of Nursing, University of Massachusetts Lowell, Lowell, MA
| | - Sandra L Mote
- Solomont School of Nursing, University of Massachusetts Lowell, Lowell, MA
| | - Brenna L Morse
- Solomont School of Nursing, University of Massachusetts Lowell, Lowell, MA
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Influenza Vaccine Hesitancy: Scope, Influencing Factors, and Strategic Interventions. Pediatr Clin North Am 2023; 70:227-241. [PMID: 36841592 DOI: 10.1016/j.pcl.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Influenza vaccination rates in children are suboptimal. One underlying reason is influenza vaccine hesitancy. Tools such as the Parent Attitudes about Childhood Vaccines survey and the Vaccine Hesitancy Scale can be used to measure influenza vaccine hesitancy. The adapted Increasing Vaccination Model from Brewer and colleagues can help identify factors that influence influenza vaccine hesitancy, motivation, and uptake. Several strategies can be used to address influenza vaccine hesitancy, which we discuss further in this review.
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A Hemagglutinin Stem Vaccine Designed Rationally by AlphaFold2 Confers Broad Protection against Influenza B Infection. Viruses 2022; 14:v14061305. [PMID: 35746776 PMCID: PMC9229588 DOI: 10.3390/v14061305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 12/04/2022] Open
Abstract
Two lineages of influenza B viruses (IBV) co-circulating in human beings have been posing a significant public health burden worldwide. A substantial number of broadly neutralizing antibodies (bnAbs) have been identified targeting conserved epitopes on hemagglutinin (HA) stem domain, posing great interest for universal influenza vaccine development. Various strategies to design immunogens that selectively present these conserved epitopes are being explored. However, it has been a challenge to retain native conformation of the HA stem region, especially for soluble expression in prokaryotic systems. Here, using a structure prediction tool AlphaFold2, we rationally designed a stable stem antigen “B60-Stem-8071”, an HA stem vaccine derived from B/Brisbane/60/2006 grafted with a CR8071 epitope as a linker. The B60-Stem-8071 exhibited better solubility and more stable expression in the E. coli system compared to the naïve HA stem antigen. Immunization with B60-Stem-8071 in mice generated cross-reactive antibodies and protected mice broadly against lethal challenge with Yamagata and Victoria lineages of influenza B virus. Notably, soluble expression of B60-stem-8071 in the E. coli system showed the potential to produce the influenza B vaccine in a low-cost way. This study represents a proof of concept for the rational design of HA stem antigen based on structure prediction and analysis.
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12
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Maita H, Kobayashi T, Akimoto T, Matsuoka F, Osawa H, Kato H. Factors associated with children's seasonal influenza diagnosis by their guardians: a prospective observational study in Japan. J Prim Health Care 2022; 14:29-36. [PMID: 35417328 DOI: 10.1071/hc21135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/07/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction Children's influenza diagnosis by their guardians has been reported to be highly accurate, but clinical factors that improve the reliability of a guardian's diagnosis are unclear. Aim To determine the accuracy of guardians' influenza diagnosis of their children, investigate clinical factors that improve the diagnostic accuracy, and determine the additional clinical value of the guardian's diagnosis. Methods A prospective observational study was conducted at a primary care clinic in Japan from December 2017 to April 2019. Pre-examination checklists completed by guardians accompanying children aged Results A total of 112 patient pairs of child (median age, 6 years) and guardian (mother, 81.2%; father, 16.1%; grandmother, 1.8%; other, 0.9%) were included in the analysis. The AUC for guardians' influenza diagnosis was higher in mothers (0.72), as well as pairs with children with a history of influenza (0.72), guardians who were aware of the influenza epidemic (0.71), and unvaccinated children (0.76), than in other guardians. After multivariate analysis, the AUC increased significantly from 0.79 to 0.85. Discussion Guardians' influenza diagnosis for their children was highly accurate. We identified factors that improve the accuracy of the guardians' diagnosis and demonstrated that the guardians' diagnosis can support physicians' diagnostic accuracy.
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Affiliation(s)
- Hiroki Maita
- Development of Community Healthcare, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - Tadashi Kobayashi
- Department of General Medicine, Hirosaki University School of Medicine and Hospital, Aomori, Japan
| | - Takashi Akimoto
- Department of General Medicine, Hirosaki University School of Medicine and Hospital, Aomori, Japan
| | | | - Hiroshi Osawa
- Department of General Medicine, Hirosaki University School of Medicine and Hospital, Aomori, Japan
| | - Hiroyuki Kato
- Development of Community Healthcare, Hirosaki University Graduate School of Medicine, Aomori, Japan; and Department of General Medicine, Hirosaki University School of Medicine and Hospital, Aomori, Japan
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13
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Gachari MN, Ndegwa L, Emukule GO, Kirui L, Kalani R, Juma B, Mayieka L, Kinuthia P, Widdowson MA, Chaves SS. Severe acute respiratory illness surveillance for influenza in Kenya: Patient characteristics and lessons learnt. Influenza Other Respir Viruses 2022; 16:740-748. [PMID: 35289078 PMCID: PMC9111565 DOI: 10.1111/irv.12979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 12/24/2022] Open
Abstract
Background We describe the epidemiology and clinical features of Kenyan patients hospitalized with laboratory‐confirmed influenza compared with those testing negative and discuss the potential contribution of severe acute respiratory illness (SARI) surveillance in monitoring a broader range of respiratory pathogens. Methods We described demographic and clinical characteristics of SARI cases among children (<18 years) and adults, separately. We compared disease severity (clinical features and treatment) of hospitalized influenza positive versus negative cases and explored independent predictors of death among SARI cases using a multivariable logistic regression model. Results From January 2014 to December 2018, 11,166 persons were hospitalized with SARI and overall positivity for influenza was ~10%. There were 10,742 (96%) children (<18 years)—median age of 1 year, interquartile range (IQR = 6 months, 2 years). Only 424 (4%) of the SARI cases were adults (≥18 years), with median age of 38 years (IQR 28 years, 52 years). There was no difference in disease severity comparing influenza positive and negative cases among children. Children hospitalized with SARI who had an underlying illness had greater odds of in‐hospital death compared with those without (adjusted odds ratio 2.11 95% CI 1.09–4.07). No further analysis was done among adults due to the small sample size. Conclusion Kenya's sentinel surveillance for SARI mainly captures data on younger children. Hospital‐based platforms designed to monitor influenza viruses and associated disease burden may be adapted and expanded to other respiratory viruses to inform public health interventions. Efforts should be made to capture adults as part of routine respiratory surveillance.
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Affiliation(s)
- Maryanne N Gachari
- Kenya Field Epidemiology and Laboratory Training Program (K-FELTP), Nairobi, Kenya
| | - Linus Ndegwa
- Influenza Program, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya
| | - Gideon O Emukule
- Influenza Program, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya
| | - Lily Kirui
- Ministry of Health, National Influenza Centre (NIC), Nairobi, Kenya
| | - Rosalia Kalani
- Division of Disease Surveillance and Response, Ministry of Health, Nairobi, Kenya
| | - Bonventure Juma
- Influenza Program, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya
| | - Lilian Mayieka
- Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
| | - Peter Kinuthia
- Ministry of Health, National Influenza Centre (NIC), Nairobi, Kenya
| | - Marc-Alain Widdowson
- Division of Global Health Protection, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya.,Institute of Tropical Medicine, Antwerp, Belgium
| | - Sandra S Chaves
- Influenza Program, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya.,Influenza Division, Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, USA
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14
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Nguyen AT, Arnold BF, Kennedy CJ, Mishra K, Pokpongkiat NN, Seth A, Djajadi S, Holbrook K, Pan E, Kirley PD, Libby T, Hubbard AE, Reingold A, Colford JM, Benjamin-Chung J. Evaluation of a city-wide school-located influenza vaccination program in Oakland, California with respect to race and ethnicity: A matched cohort study. Vaccine 2021; 40:266-274. [PMID: 34872797 PMCID: PMC8881996 DOI: 10.1016/j.vaccine.2021.11.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/12/2021] [Accepted: 11/23/2021] [Indexed: 11/23/2022]
Abstract
Background: Increasing influenza vaccination coverage in school-aged children may substantially reduce community transmission. School-located influenza vaccinations (SLIV) aim to promote vaccinations by increasing accessibility, which may be especially beneficial to race/ethnicity groups that face high barriers to preventative care. Here, we evaluate the effectiveness of a city-wide SLIV program by race/ethnicity from 2014 to 2018. Methods: We used multivariate matching to pair schools in the intervention district in Oakland, CA with schools in a comparison district in West Contra Costa County, CA. We distributed cross-sectional surveys to measure caregiver-reported student vaccination status and estimated differences in vaccination coverage levels and reasons for non-vaccination between districts stratifying by race/ethnicity. We estimated difference-in-differences (DID) of laboratory confirmed influenza hospitalization incidence between districts stratified by race/ethnicity using surveillance data. Results: Differences in influenza vaccination coverage in the intervention vs. comparison district were larger among White (2017–18: 21.0% difference [95% CI: 9.7%, 32.3%]) and Hispanic/Latino (13.4% [8.8%, 18.0%]) students than Asian/Pacific Islander (API) (8.9% [1.3%, 16.5%]), Black (5.9% [−2.2%, 14.0%]), and multiracial (6.3% [−1.8%, 14.3%)) students. Concerns about vaccine effectiveness or safety were more common among Black and multiracial caregivers. Logistical barriers were less common in the intervention vs. comparison district, with the largest difference among White students. In both districts, hospitalizations in 2017–18 were higher in Blacks (Intervention: 111.5 hospitalizations per 100,00; Comparison: 134.1 per 100,000) vs. other races/ethnicities. All-age influenza hospitalization incidence was lower in the intervention site vs. comparison site among White/API individuals in 2016–17 (DID −25.14 per 100,000 [95% CI: −40.14, −10.14]) and 2017–18 (−36.6 per 100,000 [−52.7, −20.5]) and Black older adults in 2017–18 (−282.2 per 100,000 (−508.4, −56.1]), but not in other groups. Conclusions: SLIV was associated with higher vaccination coverage and lower influenza hospitalization, but associations varied by race/ethnicity. SLIV alone may be insufficient to ensure equitable influenza outcomes.
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Affiliation(s)
- Anna T Nguyen
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States; Department of Epidemiology and Population Health, Stanford University, Stanford, CA, United States.
| | - Benjamin F Arnold
- Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, CA, United States
| | - Chris J Kennedy
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, United States
| | - Kunal Mishra
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Nolan N Pokpongkiat
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Anmol Seth
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Stephanie Djajadi
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Kate Holbrook
- Division of Communicable Disease Control and Prevention, Alameda County Public Health Department, Oakland, CA, United States; Department of Community Health Systems, School of Nursing, University of California, San Francisco, San Francisco, CA, United States
| | - Erica Pan
- Division of Communicable Disease Control and Prevention, Alameda County Public Health Department, Oakland, CA, United States; California Department of Public Health, Richmond, CA, United States; Department of Pediatrics, Division of Infectious Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Pam D Kirley
- California Emerging Infections Program, Oakland, CA, United States
| | - Tanya Libby
- California Emerging Infections Program, Oakland, CA, United States
| | - Alan E Hubbard
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Arthur Reingold
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - John M Colford
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States
| | - Jade Benjamin-Chung
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, CA, United States; Department of Epidemiology and Population Health, Stanford University, Stanford, CA, United States
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15
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Benjamin-Chung J, Arnold BF, Mishra K, Kennedy CJ, Nguyen A, Pokpongkiat NN, Djajadi S, Seth A, Klein NP, Hubbard AE, Reingold A, Colford JM. City-wide school-located influenza vaccination: A retrospective cohort study. Vaccine 2021; 39:6302-6307. [PMID: 34535312 PMCID: PMC8881995 DOI: 10.1016/j.vaccine.2021.08.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/28/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND We measured the effectiveness of a city-wide school-located influenza vaccination (SLIV) program implemented in over 102 elementary schools in Oakland, California. METHODS We conducted a retrospective cohort study among Kaiser Permanente Northern California (KPNC) members of all ages residing in either the intervention or a multivariate-matched comparison site from September 2011 - August 2017. Outcomes included medically attended acute respiratory illness (MAARI), influenza hospitalization, and Oseltamivir prescriptions. We estimated difference-in-differences (DIDs) in 2014-15, 2015-16, and 2016-17 using generalized linear models and adjusted for race, ethnicity, age, sex, health plan, and language. RESULTS Pre-intervention member characteristics were similar between sites. The proportion of KPNC members vaccinated for influenza by KPNC or the SLIV program was 8-11% higher in the intervention site than the comparison site during the intervention period. Among school-aged children, SLIV was associated with lower Oseltamivir prescriptions per 1,000 (DIDs: -3.5 (95% CI -5.5, -1.5) in 2015-16; -4.0 (95% CI -6.5, -1.6) in 2016-17) but not with other outcomes. SLIV was associated with lower MAARI per 1,000 in adults 65 + years (2014-15: -13.2, 95% CI -23.2, -3.2; 2015-16: -21.5, 95% CI -31.1, -11.9; 2016-17: -13.0, 95% CI -23.2, -2.9). There were few significant associations with other outcomes among adults. CONCLUSIONS A city-wide SLIV intervention was associated with higher influenza vaccination coverage, lower Oseltamivir prescriptions in school-aged children, and lower MAARI among people over 65 years, suggesting possible indirect effects of SLIV among older adults.
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Affiliation(s)
- Jade Benjamin-Chung
- Department of Epidemiology & Population Health, Stanford University, Stanford, CA, United States; Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States.
| | - Benjamin F Arnold
- Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, CA, United States; Department of Ophthalmology, University of California, San Francisco, San Francisco, CA, United States
| | - Kunal Mishra
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Chris J Kennedy
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Anna Nguyen
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Nolan N Pokpongkiat
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Stephanie Djajadi
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Anmol Seth
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Nicola P Klein
- Kaiser Permanente Vaccine Study Center, Oakland, CA, United States
| | - Alan E Hubbard
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - Arthur Reingold
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
| | - John M Colford
- Division of Epidemiology & Biostatistics, University of California, Berkeley, CA, United States
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BOCCALINI SARA, PARIANI ELENA, CALABRÒ GIOVANNAELISA, DE WAURE CHIARA, PANATTO DONATELLA, AMICIZIA DANIELA, LAI PIEROLUIGI, RIZZO CATERINA, AMODIO EMANUELE, VITALE FRANCESCO, CASUCCIO ALESSANDRA, DI PIETRO MARIALUISA, GALLI CRISTINA, BUBBA LAURA, PELLEGRINELLI LAURA, VILLANI LEONARDO, D’AMBROSIO FLORIANA, CAMINITI MARTA, LORENZINI ELISA, FIORETTI PAOLA, MICALE ROSANNATINDARA, FRUMENTO DAVIDE, CANTOVA ELISA, PARENTE FLAVIO, TRENTO GIACOMO, SOTTILE SARA, PUGLIESE ANDREA, BIAMONTE MASSIMILIANOALBERTO, GIORGETTI DUCCIO, MENICACCI MARCO, D’ANNA ANTONIO, AMMOSCATO CLAUDIA, LA GATTA EMANUELE, BECHINI ANGELA, BONANNI PAOLO. [Health Technology Assessment (HTA) of the introduction of influenza vaccination for Italian children with Fluenz Tetra ®]. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2021; 62:E1-E118. [PMID: 34909481 PMCID: PMC8639053 DOI: 10.15167/2421-4248/jpmh2021.62.2s1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- SARA BOCCALINI
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze, Firenze, Italia
| | - ELENA PARIANI
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milano, Italia
- Centro Interuniversitario per la Ricerca sull'Influenza e le altre Infezioni Trasmissibili CIRI-IT, Italia
| | - GIOVANNA ELISA CALABRÒ
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma, Italia
- VIHTALI (Value In Health Technology and Academy for Leadership & Innovation), spin off dell’Università Cattolica del Sacro Cuore, Roma, Italia
| | - CHIARA DE WAURE
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Perugia, Perugia, Italia
| | - DONATELLA PANATTO
- Centro Interuniversitario per la Ricerca sull'Influenza e le altre Infezioni Trasmissibili CIRI-IT, Italia
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - DANIELA AMICIZIA
- Centro Interuniversitario per la Ricerca sull'Influenza e le altre Infezioni Trasmissibili CIRI-IT, Italia
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - PIERO LUIGI LAI
- Centro Interuniversitario per la Ricerca sull'Influenza e le altre Infezioni Trasmissibili CIRI-IT, Italia
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - CATERINA RIZZO
- Area Funzionale Percorsi Clinici ed Epidemiologia, Ospedale Pediatrico Bambino Gesù, IRCCS, Roma, Italia
| | - EMANUELE AMODIO
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D'Alessandro”, Università degli Studi di Palermo, Palermo, Italia
| | - FRANCESCO VITALE
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D'Alessandro”, Università degli Studi di Palermo, Palermo, Italia
| | - ALESSANDRA CASUCCIO
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D'Alessandro”, Università degli Studi di Palermo, Palermo, Italia
| | - MARIA LUISA DI PIETRO
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - CRISTINA GALLI
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milano, Italia
| | - LAURA BUBBA
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milano, Italia
| | - LAURA PELLEGRINELLI
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milano, Italia
| | - LEONARDO VILLANI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - FLORIANA D’AMBROSIO
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - MARTA CAMINITI
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Perugia, Perugia, Italia
| | - ELISA LORENZINI
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Perugia, Perugia, Italia
| | - PAOLA FIORETTI
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Perugia, Perugia, Italia
| | | | - DAVIDE FRUMENTO
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - ELISA CANTOVA
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - FLAVIO PARENTE
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - GIACOMO TRENTO
- Dipartimento di Scienze della Salute, Università degli Studi di Genova, Genova, Italia
| | - SARA SOTTILE
- Università degli Studi di Trento, Trento, Italia
| | | | | | - DUCCIO GIORGETTI
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze, Firenze, Italia
| | - MARCO MENICACCI
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze, Firenze, Italia
| | - ANTONIO D’ANNA
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D'Alessandro”, Università degli Studi di Palermo, Palermo, Italia
| | - CLAUDIA AMMOSCATO
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D'Alessandro”, Università degli Studi di Palermo, Palermo, Italia
| | - EMANUELE LA GATTA
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - ANGELA BECHINI
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze, Firenze, Italia
| | - PAOLO BONANNI
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze, Firenze, Italia
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A Call for a Reform of the Influenza Immunization Program in Mexico: Epidemiologic and Economic Evidence for Decision Making. Vaccines (Basel) 2021; 9:vaccines9030286. [PMID: 33808916 PMCID: PMC8003748 DOI: 10.3390/vaccines9030286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/03/2021] [Accepted: 03/11/2021] [Indexed: 11/17/2022] Open
Abstract
Limited information is available to determine the effectiveness of Mexico's national influenza vaccination guidelines and inform policy updates. We aim to propose reforms to current influenza vaccination policies based on our analysis of cost-effectiveness studies. This cross-sectional epidemiological study used influenza case, death, discharge and hospitalization data from several influenza seasons and applied a one-year decision-analytic model to assess cost-effectiveness. The primary health outcome was influenza cases avoided; secondary health outcomes were influenza-related events associated with case reduction. By increasing vaccination coverage to 75% in the population aged 12-49 years with risk factors (diabetes, high blood pressure, morbid obesity, chronic renal failure, asthma, pregnancy), and expanding universal vaccination coverage to school-aged children (5-11 years) and adults aged 50-59 years, 7142-671,461 influenza cases; 1-15 deaths; 7615-262,812 healthcare visits; 2886-154,143 emergency room admissions and 2891-97,637 hospitalizations could be prevented (ranges correspond to separate age and risk factor groups), with a net annual savings of 3.90 to 111.99 million USD. Such changes to the current vaccination policy could potentially result in significant economic and health benefits. These data could be used to inform the revision of a vaccination policy in Mexico with substantial social value.
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Efficacy and safety of a live attenuated influenza vaccine in Chinese healthy children aged 3–17 years in one study center of a randomized, double-blind, placebo-controlled phase 3 clinical trial, 2016/17 season. Vaccine 2020; 38:5979-5986. [DOI: 10.1016/j.vaccine.2020.07.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/09/2020] [Accepted: 07/11/2020] [Indexed: 11/23/2022]
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19
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Benjamin-Chung J, Arnold BF, Kennedy CJ, Mishra K, Pokpongkiat N, Nguyen A, Jilek W, Holbrook K, Pan E, Kirley PD, Libby T, Hubbard AE, Reingold A, Colford JM. Evaluation of a city-wide school-located influenza vaccination program in Oakland, California, with respect to vaccination coverage, school absences, and laboratory-confirmed influenza: A matched cohort study. PLoS Med 2020; 17:e1003238. [PMID: 32810149 PMCID: PMC7433855 DOI: 10.1371/journal.pmed.1003238] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 07/14/2020] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND It is estimated that vaccinating 50%-70% of school-aged children for influenza can produce population-wide indirect effects. We evaluated a city-wide school-located influenza vaccination (SLIV) intervention that aimed to increase influenza vaccination coverage. The intervention was implemented in ≥95 preschools and elementary schools in northern California from 2014 to 2018. Using a matched cohort design, we estimated intervention impacts on student influenza vaccination coverage, school absenteeism, and community-wide indirect effects on laboratory-confirmed influenza hospitalizations. METHODS AND FINDINGS We used a multivariate matching algorithm to identify a nearby comparison school district with pre-intervention characteristics similar to those of the intervention school district and matched schools in each district. To measure student influenza vaccination, we conducted cross-sectional surveys of student caregivers in 22 school pairs (2017 survey, N = 6,070; 2018 survey, N = 6,507). We estimated the incidence of laboratory-confirmed influenza hospitalization from 2011 to 2018 using surveillance data from school district zip codes. We analyzed student absenteeism data from 2011 to 2018 from each district (N = 42,487,816 student-days). To account for pre-intervention differences between districts, we estimated difference-in-differences (DID) in influenza hospitalization incidence and absenteeism rates using generalized linear and log-linear models with a population offset for incidence outcomes. Prior to the SLIV intervention, the median household income was $51,849 in the intervention site and $61,596 in the comparison site. The population in each site was predominately white (41% in the intervention site, 48% in the comparison site) and/or of Hispanic or Latino ethnicity (26% in the intervention site, 33% in the comparison site). The number of students vaccinated by the SLIV intervention ranged from 7,502 to 10,106 (22%-28% of eligible students) each year. During the intervention, influenza vaccination coverage among elementary students was 53%-66% in the comparison district. Coverage was similar between the intervention and comparison districts in influenza seasons 2014-2015 and 2015-2016 and was significantly higher in the intervention site in seasons 2016-2017 (7%; 95% CI 4, 11; p < 0.001) and 2017-2018 (11%; 95% CI 7, 15; p < 0.001). During seasons when vaccination coverage was higher among intervention schools and the vaccine was moderately effective, there was evidence of statistically significant indirect effects: The DID in the incidence of influenza hospitalization per 100,000 in the intervention versus comparison site was -17 (95% CI -30, -4; p = 0.008) in 2016-2017 and -37 (95% CI -54, -19; p < 0.001) in 2017-2018 among non-elementary-school-aged individuals and -73 (95% CI -147, 1; p = 0.054) in 2016-2017 and -160 (95% CI -267, -53; p = 0.004) in 2017-2018 among adults 65 years or older. The DID in illness-related school absences per 100 school days during the influenza season was -0.63 (95% CI -1.14, -0.13; p = 0.014) in 2016-2017 and -0.80 (95% CI -1.28, -0.31; p = 0.001) in 2017-2018. Limitations of this study include the use of an observational design, which may be subject to unmeasured confounding, and caregiver-reported vaccination status, which is subject to poor recall and low response rates. CONCLUSIONS A city-wide SLIV intervention in a large, diverse urban population was associated with a decrease in the incidence of laboratory-confirmed influenza hospitalization in all age groups and a decrease in illness-specific school absence rate among students in 2016-2017 and 2017-2018, seasons when the vaccine was moderately effective, suggesting that the intervention produced indirect effects. Our findings suggest that in populations with moderately high background levels of influenza vaccination coverage, SLIV programs are associated with further increases in coverage and reduced influenza across the community.
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Affiliation(s)
- Jade Benjamin-Chung
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Benjamin F. Arnold
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
- Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California, United States of America
| | - Chris J. Kennedy
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Kunal Mishra
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Nolan Pokpongkiat
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Anna Nguyen
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Wendy Jilek
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Kate Holbrook
- Division of Communicable Disease Control and Prevention, Alameda County Public Health Department, Oakland, California, United States of America
| | - Erica Pan
- Division of Communicable Disease Control and Prevention, Alameda County Public Health Department, Oakland, California, United States of America
- Department of Pediatrics, Division of Infectious Diseases, University of California, San Francisco, San Francisco, California, United States of America
| | - Pam D. Kirley
- California Emerging Infections Program, Oakland, California, United States of America
| | - Tanya Libby
- California Emerging Infections Program, Oakland, California, United States of America
| | - Alan E. Hubbard
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - Arthur Reingold
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
| | - John M. Colford
- Division of Epidemiology and Biostatistics, University of California, Berkeley, Berkeley, California, United States of America
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Falcón-Lezama JA, Saucedo-Martínez R, Betancourt-Cravioto M, Alfaro-Cortes MM, Bahena-González RI, Tapia-Conyer R. Influenza in the school-aged population in Mexico: burden of disease and cost-effectiveness of vaccination in children. BMC Infect Dis 2020; 20:240. [PMID: 32197591 PMCID: PMC7085158 DOI: 10.1186/s12879-020-4948-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 03/04/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The current national influenza vaccination schedule in Mexico does not recommend vaccination in the school-aged population (5-11 years). Currently, there are limited data from middle-income countries analysing the cost-effectiveness of influenza vaccination in this population. We explored the clinical effects and economic benefits of expanding the current national influenza vaccination schedule in Mexico to include the school-aged population. METHODS A static 1-year model incorporating herd effect was used to assess the cost-effectiveness of expanding the current national influenza vaccination schedule of Mexico to include the school-aged population. We performed a cross-sectional epidemiological study using influenza records (2009-2018), death records (2010-2015), and discharge and hospitalisation records (2010-2016), from the databases of Mexico's Influenza Surveillance System (SISVEFLU), the National Mortality Epidemiological and Statistical System (SEED), and the Automated Hospital Discharge System (SAEH), respectively. Cost estimates for influenza cases were based on 7 scenarios using data analysed from SISVEFLU; assumptions for clinical management of cases were defined according to Mexico's national clinical guidelines. The primary health outcome for this study was the number of influenza cases avoided. A sensitivity analysis was performed using conservative and optimistic parameters (vaccination coverage: 30% / 70%, Vaccine effectiveness: 19% / 68%). RESULTS It was estimated that expanding the influenza immunisation programme to cover school-aged population in Mexico over the 2018-2019 influenza season would result in 671,461 cases of influenza avoided (50% coverage and 50% effectiveness assumed). Associated with this were 262,800 fewer outpatient consultations; 154,100 fewer emergency room consultations; 97,600 fewer hospitalisations, and 15 fewer deaths. Analysis of cases avoided by age-group showed that 55.4% of them were in the school-aged population, and the decrease in outpatient consultations was largest in this population. There was an overall decrease in the economic burden for the Mexican health care system of 111.9 million US dollars; the immunization programme was determined to be cost-saving in the base, conservative and optimistic scenarios. CONCLUSIONS Vaccinating school-aged population in Mexico would be cost-effective; expansion of the current national vaccination schedule to this age group is supported.
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Affiliation(s)
| | - Rodrigo Saucedo-Martínez
- Sociedad Mexicana de Salud Pública, Herschel 109, Anzures, Miguel Hidalgo, 11590, Mexico City, Mexico
| | | | - Myrna María Alfaro-Cortes
- Sociedad Mexicana de Salud Pública, Herschel 109, Anzures, Miguel Hidalgo, 11590, Mexico City, Mexico
| | | | - Roberto Tapia-Conyer
- Sociedad Mexicana de Salud Pública, Herschel 109, Anzures, Miguel Hidalgo, 11590, Mexico City, Mexico.
- Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Escolar CU, Edificio B 1er Piso, Coyoacan, 04510, Mexico City, Mexico.
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Offeddu V, Low MSF, Surendran S, Kembhavi G, Tam CC. Acceptance and feasibility of school-based seasonal influenza vaccination in Singapore: A qualitative study. Vaccine 2020; 38:1834-1841. [PMID: 31862193 DOI: 10.1016/j.vaccine.2019.12.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 12/06/2019] [Accepted: 12/10/2019] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Influenza is a major cause of disease in children. School-based seasonal influenza vaccination can be a cost-effective tool to improve vaccine uptake among children, and can bring substantial health and economic benefits to the broader community. The acceptance and feasibility of school-based influenza vaccination are likely to be highly context-specific, but limited data exist from tropical settings with year-round influenza transmission. We conducted a qualitative study to assess acceptability and feasibility of a school-based seasonal influenza vaccination programme in Singapore. METHODS We conducted qualitative in-depth interviews with key stakeholders, including healthcare professionals, representatives of relevant ministries, preschool principals and parents to understand their perspectives on a proposed school-based seasonal influenza vaccination programme. Interviews were transcribed verbatim and analysed using thematic analysis. RESULTS We conducted 40 interviews. Although preschool-aged children are currently the recommended age group for vaccination, stakeholders suggested introducing the programme in primary and/or secondary schools, where existing vaccination infrastructure would facilitate delivery. However, more comprehensive evidence on the local influenza burden and transmission patterns among children is required to develop an evidence-based, locally relevant rationale for a school-based vaccination programme and effectively engage policy-makers, school staff, and parents. Extensive, age-appropriate public education and awareness campaigns would increase the acceptability of the programme among stakeholders. Stakeholders indicated that an opt-out programme with free or subsidised vaccination would be the most likely to achieve high vaccine coverage and make access to vaccination more equitable. CONCLUSIONS Overall, participants were supportive of a free or subsidised school-based influenza vaccination programme in primary and/or secondary schools, although children in this age group are not currently a recommended group for vaccination. However, a better informed, evidence-based rationale to estimate the programme's impact in Singapore is currently lacking. Extensive, age-appropriate public education and awareness campaigns will help ensure full support across key stakeholder groups.
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Affiliation(s)
- Vittoria Offeddu
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, 117549 Singapore.
| | - Mabel Sheau Fong Low
- Harvard T.H. Chan School of Public Health, Harvard University, MA 02138 Cambridge, USA
| | - Shilpa Surendran
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, 117549 Singapore.
| | - Gayatri Kembhavi
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, 117549 Singapore
| | - Clarence C Tam
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, 117549 Singapore; London School of Hygiene & Tropical Medicine, WC1E 7HT London, United Kingdom.
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Zhang L, van der Hoek W, Krafft T, Pilot E, Asten LV, Lin G, Wu S, Duan W, Yang P, Wang Q. Influenza vaccine effectiveness estimates against influenza A(H3N2) and A(H1N1) pdm09 among children during school-based outbreaks in the 2016-2017 season in Beijing, China. Hum Vaccin Immunother 2019; 16:816-822. [PMID: 31596661 DOI: 10.1080/21645515.2019.1677438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background: Since 2007, trivalent inactivated influenza vaccine (TIV) has been provided free-of-charge to primary, middle school and high school students in Beijing. However, there have been few school-based studies on influenza vaccine effectiveness (VE). In this report, we estimated influenza VE against laboratory-confirmed influenza illness among school children in Beijing, China during the 2016-2017 influenza season.Methods: The VE of 2016-2017 TIV against laboratory-confirmed influenza virus infection among school-age children was assessed through a case-control design. Conditional logistic regression was conducted on matched case-control sets to estimate VE. The effect of prior vaccination on current VE was also examined.Results: All 176 samples tested positive for influenza A virus with the positive rate of 55.5%. The average coverage rate of 2016-2017 TIV among students across the 37 schools was 30.6%. The fully adjusted VE of 2016-2017 TIV against laboratory-confirmed influenza was 69% (95% CI: 51 to 81): 60% (95% CI: -15 to 86) for influenza A(H1N1)pdm09 and 73% (95% CI: 52 to 84) for influenza A(H3N2). The overall VE for receipt of 2015-2016 vaccination only, 2016-2017 vaccination only, and vaccinations in both seasons was 46% (95% CI: -5 to 72), 77% (95% CI: 58 to 87), and 57% (95%CI: 17 to 78), respectively.Conclusions: Our study during school outbreaks found that VE of 2016-2017 TIV was moderate against influenza A(H3N2) as well as A(H1N1)pdm09 viruses.
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Affiliation(s)
- Li Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Research Center for Preventive Medicine, Beijing, China
| | - Wim van der Hoek
- Centre for Infectious Diseases, Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Thomas Krafft
- Department of Health, Ethics & Society, CAPHRI Care and Public Health Research Institute, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Eva Pilot
- Department of Health, Ethics & Society, CAPHRI Care and Public Health Research Institute, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Liselotte van Asten
- Centre for Infectious Diseases, Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Ge Lin
- Department of Environmental and Occupational Health, School of Public Health, University of Nevada Las Vegas, Las Vegas, NV, USA
| | - Shuangsheng Wu
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Research Center for Preventive Medicine, Beijing, China
| | - Wei Duan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Research Center for Preventive Medicine, Beijing, China
| | - Peng Yang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Research Center for Preventive Medicine, Beijing, China.,School of Public Health, Capital Medical University, Beijing, China
| | - Quanyi Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Research Center for Preventive Medicine, Beijing, China
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Exploring indirect protection associated with influenza immunization - A systematic review of the literature. Vaccine 2019; 37:7213-7232. [PMID: 31648907 DOI: 10.1016/j.vaccine.2019.09.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Influenza causes significant annual morbidity and mortality, particularly in older adults, for whom influenza vaccine effectiveness (VE) is also lower. Immunizing one group (e.g., children) against influenza may indirectly protect another group (e.g., older adults) against influenza and its complications. METHODS We updated previous systematic reviews on indirect protection against influenza by searching MEDLINE and EMBASE for relevant human studies published until January 4, 2017. We abstracted and critically appraised English language publications that reported or provided information to calculate indirect VE against influenza, as a percentage, in non-institutional settings. We developed a term called 'estimated actual protection' to explore the relationship between indirect protection and the product of direct VE and relative vaccine coverage. We calculated estimated actual protection for a subset of studies that reported coverage and indirect VE for: laboratory-confirmed influenza; outpatient care for respiratory illness; influenza-associated emergency visits; or influenza-associated hospitalizations. We ran linear mixed models to compare estimated actual protection against indirect VE for the four outcomes, and graphed the data. RESULTS Of 2320 unique records identified, we abstracted and appraised 26 articles describing 24 studies. The majority of included studies reported at least one outcome suggesting that immunizing one group reduced influenza-related outcomes in another group. Critical appraisal of the abstracted studies identified recurring methodological weaknesses, such as lack of laboratory-confirmed influenza. Our exploratory analyses of 18 studies indicated a positive but not statistically significant relationship between estimated actual protection and indirect protection for each of the four outcomes. CONCLUSIONS Our systematic review and exploratory analyses suggest influenza immunization provides some level of indirect protection. However, our critical appraisal highlights the need for a standardized and consistently applied approach to measuring indirect protection against influenza to fill existing knowledge gaps. Additionally, the concept of estimated actual protection requires validation.
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Ryan KA, Filipp SL, Gurka MJ, Zirulnik A, Thompson LA. Understanding influenza vaccine perspectives and hesitancy in university students to promote increased vaccine uptake. Heliyon 2019; 5:e02604. [PMID: 31667418 PMCID: PMC6812243 DOI: 10.1016/j.heliyon.2019.e02604] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/02/2019] [Accepted: 10/01/2019] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Influenza vaccine hesitancy is a global barrier to controlling seasonal influenza. Influenza vaccination rates in university students lag behind current goals and pose a significant threat to the health of students on campuses. A broader understanding of the knowledge, attitudes and beliefs of university students are needed to develop targeted interventions to increase vaccination. METHODS An anonymous cross-sectional survey was developed and distributed via REDCap to graduate and undergraduate students via individual college listservs at a large public university. Survey questions included demographic information and questions about vaccination history, preference for vaccine type (inactivated vaccine (IIV) or live attenuated vaccine (LAIV), knowledge of influenza vaccines, reasons for accepting or refusing vaccine and preference for receiving vaccine information and education. RESULTS Students in 14 colleges received the survey and 1039 respondents were included in analysis. Sixty two percent reported having been vaccinated for influenza and of those vaccinated most were in health-related fields that require vaccination. Graduate and vaccinated students were more knowledgeable about influenza; undergraduates had lower vaccination rates. Students preferred IIV over LAIV and were more knowledgeable about IIV. Those with history of vaccination during childhood had higher rates of vaccination. Twenty six percent overall and 41.6% of the unvaccinated still believed you could get the flu from the flu vaccine. Fear of needles and inconvenience were cited as major reasons for not getting vaccinated. Incentives were cited as important motivators by only 20%. Students preferred to receive vaccine information from medical providers followed by online information and campus events. CONCLUSIONS A multipronged approach to increasing influenza vaccination of university students will be needed. Myths about influenza vaccine persist even in a relatively educated population. Programs will need to target undergraduate and students in non health-related fields, offer vaccine choices - IIV and LAIV and promote vaccination through medical providers and online information.
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Affiliation(s)
- Kathleen A. Ryan
- University of Florida Department of Pediatrics, 1600 Archer Rd, P.O. Box 100296, Gainesville, FL 32610, USA
- University of Florida Emerging Pathogens Institute, 2055 Mowry Rd, P.O. Box 100009, Gainesville, FL 32610, USA
| | - Stephanie L. Filipp
- University of Florida Department of Health Outcomes and Biomedical Informatics, 2044 Mowry Rd, PO Box 100177, Gainesville, FL 32610, USA
| | - Matthew J. Gurka
- University of Florida Department of Health Outcomes and Biomedical Informatics, 2044 Mowry Rd, PO Box 100177, Gainesville, FL 32610, USA
| | - Alexander Zirulnik
- University of Florida College of Medicine, P.O. Box 100215, Gainesville, FL 32610, USA
| | - Lindsay A. Thompson
- University of Florida Department of Pediatrics, 1600 Archer Rd, P.O. Box 100296, Gainesville, FL 32610, USA
- University of Florida Department of Health Outcomes and Biomedical Informatics, 2044 Mowry Rd, PO Box 100177, Gainesville, FL 32610, USA
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Cost effectiveness of school-located influenza vaccination programs for elementary and secondary school children. BMC Health Serv Res 2019; 19:407. [PMID: 31234842 PMCID: PMC6591987 DOI: 10.1186/s12913-019-4228-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 06/07/2019] [Indexed: 12/04/2022] Open
Abstract
Background Studies have noted variations in the cost-effectiveness of school-located influenza vaccination (SLIV), but little is known about how SLIV’s cost-effectiveness may vary by targeted age group (e.g., elementary or secondary school students), or vaccine consent process (paper-based or web-based). Further, SLIV’s cost-effectiveness may be impacted by its spillover effect on practice-based vaccination; prior studies have not addressed this issue. Methods We performed a cost-effectiveness analysis on two SLIV programs in upstate New York in 2015–2016: (a) elementary school SLIV using a stepped wedge design with schools as clusters (24 suburban and 18 urban schools) and (b) secondary school SLIV using a cluster randomized trial (16 suburban and 4 urban schools). The cost-per-additionally-vaccinated child (i.e., incremental cost-effectiveness ratio (ICER)) was estimated by dividing the incremental SLIV intervention cost by the incremental effectiveness (i.e., the additional number of vaccinated students in intervention schools compared to control schools). We performed deterministic analyses, one-way sensitivity analyses, and probabilistic analyses. Results The overall effectiveness measure (proportion of children vaccinated) was 5.7 and 5.5 percentage points higher, respectively, in intervention elementary (52.8%) and secondary schools (48.2%) than grade-matched control schools. SLIV programs vaccinated a small proportion of children in intervention elementary (5.2%) and secondary schools (2.5%). In elementary and secondary schools, the ICER excluding vaccine purchase was $85.71 and $86.51 per-additionally-vaccinated-child, respectively. When additionally accounting for observed spillover impact on practice-based vaccination, the ICER decreased to $80.53 in elementary schools -- decreasing substantially in secondary schools. (to $53.40). These estimates were higher than the published practice-based vaccination cost (median = $25.50, mean = $45.48). Also, these estimates were higher than our 2009–2011 urban SLIV program mean costs ($65) due to additional costs for use of a new web-based consent system ($12.97 per-additionally-vaccinated-child) and higher project coordination costs in 2015–2016. One-way sensitivity analyses showed that ICER estimates were most sensitive to the SLIV effectiveness. Conclusions SLIV raises vaccination rates and may increase practice-based vaccination in primary care practices. While these SLIV programs are effective, to be as cost-effective as practice-based vaccination our SLIV programs would need to vaccinate more students and/or lower the costs for consent systems and project coordination. Trial Registration ClinicalTrials.govNCT02227186 (August 25, 2014), updated NCT03137667 (May 2, 2017). Electronic supplementary material The online version of this article (10.1186/s12913-019-4228-5) contains supplementary material, which is available to authorized users.
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Vaughn AR, Johnson ML. Communicating and enhancing teachers' attitudes and understanding of influenza using refutational text. Vaccine 2018; 36:7306-7315. [PMID: 30342900 DOI: 10.1016/j.vaccine.2018.10.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 11/26/2022]
Abstract
Influenza is an important public health issue and schools play an important part in preventing influenza outbreaks. However, little is known about teachers' knowledge and attitudes toward influenza and vaccination. The purposes of this project were to assess preservice and early career teachers' knowledge and attitudes of influenza, evaluate the effectiveness of a refutational text on increasing teachers' attitudes towards and knowledge of influenza and vaccination, and evaluate the effects of participant epistemology, motivation, and cognitive engagement on influenza attitudes and knowledge. We implemented an experimental intervention with 64 pre-service and early career teachers on the effects of a refutational text in remedying influenza misconceptions. Teachers in this sample have vaccination rates (36% received five vaccines in a five-year period) consistent with other US adults. Pre-intervention knowledge scores were moderate and attitudes were slightly positive. Positive attitudes were correlated with increased vaccination. We found refutational texts are effective in eliciting more positive attitudes toward influenza vaccination. We found cognitive engagement was positively correlated to change in attitude. Refutational texts provide an effective mode of influenza and vaccination education.
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Affiliation(s)
- Ashley R Vaughn
- Department of Social and Behavioral Sciences, Miami University, Hamilton, USA; Department of Educational Studies, University of Cincinnati, Cincinnati, USA.
| | - Marcus L Johnson
- Department of Educational Studies, University of Cincinnati, Cincinnati, USA
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Cohee L, Laufer M. Tackling malaria transmission in sub-Saharan Africa. Lancet Glob Health 2018; 6:e598-e599. [PMID: 29661636 PMCID: PMC6375073 DOI: 10.1016/s2214-109x(18)30197-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 03/20/2018] [Indexed: 02/07/2023]
Affiliation(s)
- Lauren Cohee
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Division of Malaria, Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | - Miriam Laufer
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Division of Malaria, Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Boccalini S, Bechini A, Innocenti M, Sartor G, Manzi F, Bonanni P, Panatto D, Lai PL, Zangrillo F, Rizzitelli E, Iovine M, Amicizia D, Bini C, Marcellusi A, Mennini FS, Rinaldi A, Trippi F, Ferriero AM, Lisi GC. [The universal influenza vaccination in children with Vaxigrip Tetra ® in Italy: an evaluation of Health Technology Assessment]. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2018; 59:E1-E86. [PMID: 30465031 PMCID: PMC6219245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Sara Boccalini
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze
| | - Angela Bechini
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze
| | | | - Gino Sartor
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze
| | - Federico Manzi
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze
| | - Paolo Bonanni
- Dipartimento di Scienze della Salute, Università degli Studi di Firenze
| | - Donatella Panatto
- Dipartimento di Scienze della Salute, Università degli Studi di Genova
| | - Piero Luigi Lai
- Dipartimento di Scienze della Salute, Università degli Studi di Genova
| | | | | | | | - Daniela Amicizia
- Dipartimento di Scienze della Salute, Università degli Studi di Genova
| | - Chiara Bini
- Economic Evaluation and HTA (CEIS- EEHTA) - Facoltà di Economia, Università Tor Vergata
| | - Andrea Marcellusi
- Economic Evaluation and HTA (CEIS- EEHTA) - Facoltà di Economia, Università Tor Vergata
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Shibata N, Kimura S, Hoshino T, Takeuchi M, Urushihara H. Effectiveness of influenza vaccination for children in Japan: Four-year observational study using a large-scale claims database. Vaccine 2018; 36:2809-2815. [DOI: 10.1016/j.vaccine.2018.03.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 02/26/2018] [Accepted: 03/29/2018] [Indexed: 12/25/2022]
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Abstract
The efficacy of influenza vaccines varies from one year to the next, with efficacy during the 2017-2018 season anticipated to be lower than usual. However, the impact of low-efficacy vaccines at the population level and their optimal age-specific distribution have yet to be ascertained. Applying an optimization algorithm to a mathematical model of influenza transmission and vaccination in the United States, we determined the optimal age-specific uptake of low-efficacy vaccine that would minimize incidence, hospitalization, mortality, and disability-adjusted life-years (DALYs), respectively. We found that even relatively low-efficacy influenza vaccines can be highly impactful, particularly when vaccine uptake is optimally distributed across age groups. As vaccine efficacy declines, the optimal distribution of vaccine uptake shifts toward the elderly to minimize mortality and DALYs. Health practitioner encouragement and concerted recruitment efforts are required to achieve optimal coverage among target age groups, thereby minimizing influenza morbidity and mortality for the population overall.
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31
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The effectiveness of influenza vaccination among nursery school children in China during the 2016/17 influenza season. Vaccine 2018; 36:2456-2461. [DOI: 10.1016/j.vaccine.2018.03.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 03/10/2018] [Accepted: 03/14/2018] [Indexed: 11/19/2022]
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Pan Y, Wang Q, Yang P, Zhang L, Wu S, Zhang Y, Sun Y, Duan W, Ma C, Zhang M, Zhang X, MacIntyre CR. Influenza vaccination in preventing outbreaks in schools: A long-term ecological overview. Vaccine 2017; 35:7133-7138. [PMID: 29128383 DOI: 10.1016/j.vaccine.2017.10.096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/27/2017] [Accepted: 10/28/2017] [Indexed: 11/25/2022]
Abstract
Influenza vaccination is the most effective way to reduce the incidence of influenza infections. However, the role of influenza vaccination, such as school-based influenza vaccination, in preventing the influenza outbreaks in schools remains unclear now. In this study, a total of 286 school febrile outbreaks involving 6863 cases in the Beijing area from September 1, 2006 to March 31, 2017 were analyzed. We also tested 294 circulating strains isolated in Beijing during the same period and compared with that of vaccine strains identified every influenza season. The virological match/mismatch between vaccine strains and circulating strains, and the coverage of vaccination in schools were analyzed against outbreaks during the 11 years. It showed that over 80% school febrile outbreaks were caused by influenza A/B virus, the most frequent being A(H3N2) virus (53.25%), followed by A(H1N1)pdm09 virus (25.11%) and B virus (21.64%). More importantly, low vaccine coverage (in 2006-2007 influenza season) and vaccine mismatch (in 2014-2015 and 2015-2016 influenza season) were associated with an increased number of influenza school outbreaks. High vaccination coverage with a matched vaccine can significantly reduce influenza outbreaks in schools (OR: 0.111, p < .001). We have shown the effectiveness of school-based influenza vaccination in preventing outbreaks using trivalent inactivated influenza vaccine in schools. Thus the school-based vaccine policy should be paid more attention in China and other countries worldwide.
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Affiliation(s)
- Yang Pan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China; Capital Medical University School of Public Health, Beijing, China
| | - Quanyi Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China; Capital Medical University School of Public Health, Beijing, China.
| | - Peng Yang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China; Capital Medical University School of Public Health, Beijing, China.
| | - Li Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Shuangsheng Wu
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Yi Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Ying Sun
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Wei Duan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Chunna Ma
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Man Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - Xingxing Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control (CDC), Beijing, China; Research Centre for Preventive Medicine of Beijing, Beijing, China
| | - C Raina MacIntyre
- School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia; College of Health Solutions and College of Public Affairs and Community Solutions, Arizona State University, USA
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Alfelali M, Khandaker G, Booy R, Rashid H. Mismatching between circulating strains and vaccine strains of influenza: Effect on Hajj pilgrims from both hemispheres. Hum Vaccin Immunother 2017; 12:709-15. [PMID: 26317639 DOI: 10.1080/21645515.2015.1085144] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The trivalent seasonal influenza vaccine is expected to provide optimum protection if the vaccine strains match the circulating strains. The effect of worldwide mismatch between the vaccine strains and extant strains on travelers attending Hajj pilgrimage is not known. Annually 2-3 million Muslims coming from north and south hemispheres congregate at Hajj in Mecca, Saudi Arabia, where intense congestion amplifies the risk of respiratory infection up to eight fold. In order to estimate, to what extent mismatching increases the risk of vaccine failure in Hajj pilgrims, we have examined the global data on influenza epidemiology since 2003, in light of the available data from Hajj. These data demonstrate that globally mismatching between circulating and vaccine strains has occurred frequently over the last 12 years, and the mismatch seems to have affected the Hajj pilgrims, however, influenza virus characteristics were studied only in a limited number of Hajj seasons. When the vaccines are different, dual vaccination of travelers by vaccines for southern and northern hemispheres should be considered for Hajj pilgrims whenever logistically feasible. Consideration should also be given to the use of vaccines with broader coverage, i.e., quadrivalent, or higher immunogenicity. Continuous surveillance of influenza at Hajj is important.
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Affiliation(s)
- Mohammad Alfelali
- a National Center for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children's Hospital at Westmead and the University of Sydney ; Sydney , NSW , Australia.,b Department of Family and Community Medicine ; Faculty of Medicine in Rabigh, King Abdulaziz University ; Jeddah , Saudi Arabia
| | - Gulam Khandaker
- a National Center for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children's Hospital at Westmead and the University of Sydney ; Sydney , NSW , Australia.,c Centre for Perinatal Infection Research, The Children's Hospital at Westmead and the University of Sydney ; Sydney , NSW , Australia.,d Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, The University of Sydney ; Sydney , NSW , Australia
| | - Robert Booy
- a National Center for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children's Hospital at Westmead and the University of Sydney ; Sydney , NSW , Australia.,d Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, The University of Sydney ; Sydney , NSW , Australia
| | - Harunor Rashid
- a National Center for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children's Hospital at Westmead and the University of Sydney ; Sydney , NSW , Australia.,d Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, The University of Sydney ; Sydney , NSW , Australia
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McLean HQ, Peterson SH, King JP, Meece JK, Belongia EA. School absenteeism among school-aged children with medically attended acute viral respiratory illness during three influenza seasons, 2012-2013 through 2014-2015. Influenza Other Respir Viruses 2017; 11:220-229. [PMID: 27885805 PMCID: PMC5410714 DOI: 10.1111/irv.12440] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2016] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Acute respiratory illnesses (ARIs) are common in school-aged children, but few studies have assessed school absenteeism due to specific respiratory viruses. OBJECTIVE To evaluate school absenteeism among children with medically attended ARI due to common viruses. METHODS We analyzed follow-up surveys from children seeking care for acute respiratory illness who were enrolled in the influenza vaccine effectiveness study at Marshfield Clinic during the 2012-2013 through 2014-2015 influenza seasons. Archived influenza-negative respiratory swabs were retested using multiplex RT-PCR to detect 16 respiratory virus targets. Negative binomial and logistic regression models were used to examine the association between school absence and type of respiratory viruses; endpoints included mean days absent from school and prolonged (>2 days) absence. We examined the association between influenza vaccination and school absence among children with RT-PCR-confirmed influenza. RESULTS Among 1027 children, 2295 days of school were missed due to medically attended ARIs; influenza accounted for 39% of illness episodes and 47% of days missed. Mean days absent were highest for influenza (0.96-1.19) and lowest for coronavirus (0.62). Children with B/Yamagata infection were more likely to report prolonged absence than children with A/H1N1 or A/H3N2 infection [OR (95% CI): 2.1 (1.0, 4.5) and 1.7 (1.0, 2.9), respectively]. Among children with influenza, vaccination status was not associated with prolonged absence. CONCLUSIONS School absenteeism due to medically attended ARIs varies by viral infection. Influenza B infections accounted for the greatest burden of absenteeism.
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MESH Headings
- Absenteeism
- Acute Disease/epidemiology
- Acute Disease/psychology
- Adolescent
- Child
- Child, Preschool
- Female
- Follow-Up Studies
- Humans
- Influenza A Virus, H1N1 Subtype/genetics
- Influenza A Virus, H1N1 Subtype/immunology
- Influenza A Virus, H1N1 Subtype/isolation & purification
- Influenza A Virus, H3N2 Subtype/genetics
- Influenza A Virus, H3N2 Subtype/immunology
- Influenza A Virus, H3N2 Subtype/isolation & purification
- Influenza Vaccines
- Influenza, Human/epidemiology
- Influenza, Human/psychology
- Influenza, Human/virology
- Male
- Respiratory Tract Infections/epidemiology
- Respiratory Tract Infections/psychology
- Respiratory Tract Infections/virology
- Schools/statistics & numerical data
- Seasons
- Students/psychology
- Students/statistics & numerical data
- Viruses/classification
- Viruses/genetics
- Viruses/immunology
- Viruses/isolation & purification
- Wisconsin
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Facilitators and barriers of parental attitudes and beliefs toward school-located influenza vaccination in the United States: Systematic review. Vaccine 2017; 35:1987-1995. [PMID: 28320592 DOI: 10.1016/j.vaccine.2017.03.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/01/2017] [Accepted: 03/07/2017] [Indexed: 11/21/2022]
Abstract
The study objective was to identify facilitators and barriers of parental attitudes and beliefs toward school-located influenza vaccination in the United States. In 2009, the Advisory Committee on Immunization Practices of the Centers for Disease Control and Prevention expanded their recommendations for influenza vaccination to include school-aged children. We conducted a systematic review of studies focused on facilitators and barriers of parental attitudes toward school-located influenza vaccination in the United States from 1990 to 2016. We reviewed 11 articles by use of the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) framework. Facilitators were free/low cost vaccination; having belief in vaccine efficacy, influenza severity, and susceptibility; belief that vaccination is beneficial, important, and a social norm; perception of school setting advantages; trust; and parental presence. Barriers were cost; concerns regarding vaccine safety, efficacy, equipment sterility, and adverse effects; perception of school setting barriers; negative physician advice of contraindications; distrust in vaccines and school-located vaccination programs; and health information privacy concerns. We identified the facilitators and barriers of parental attitudes and beliefs toward school-located influenza vaccination to assist in the evidence-based design and implementation of influenza vaccination programs targeted for children in the United States and to improve influenza vaccination coverage for population-wide health benefits.
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Influenza Vaccine Effectiveness in Preventing Influenza Illness Among Children During School-based Outbreaks in the 2014-2015 Season in Beijing, China. Pediatr Infect Dis J 2017; 36:e69-e75. [PMID: 27902651 DOI: 10.1097/inf.0000000000001434] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Little is known about vaccine effectiveness (VE) against nonmedically attended A(H3N2) influenza illness during 2014-2015 when the vaccine component appeared to be a poor match with circulating strains. METHODS Forty-three eligible school influenza outbreaks in Beijing, China, from November 1, 2014, to December 31, 2014, were included in this study. The VE of 2014-2015 trivalent inactivated influenza vaccine (IIV3) was assessed in preventing laboratory-confirmed influenza among school-age children through a case-control design, using asymptomatic controls. Influenza vaccination was documented from a vaccination registry. VE was estimated adjusting for age group, sex, rural versus urban area, body mass index, chronic conditions, onset week and schools through a mixed effects logistic regression model. RESULTS The average coverage rate of 2014-2015 IIV3 among students across the 43 schools was 47.6%. The fully adjusted VE of 2014-2015 IIV3 against laboratory-confirmed influenza was 38% [95% confidence interval (CI): 12%-57%]. Receipt of previous season's (2013-2014) IIV3 significantly modified VE of the 2014-2015 IIV3; children who received both 2013-2014 and 2014-2015 vaccinations had VE of 29% (95% CI: -8% to 53%), whereas VE for children who received 2014-2015 IIV3 only was 54% (95% CI: 8%-77%). CONCLUSIONS VE for 2014-2015 IIV3 against A(H3N2) illness identified in schools was modest. Children who did not receive the prior season's vaccine with a homologous A(H3N2) component may have enjoyed greater protection than repeated vaccinees.
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37
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Yang TU, Kim HJ, Lee YK, Park YJ. Psychogenic illness following vaccination: exploratory study of mass vaccination against pandemic influenza A (H1N1) in 2009 in South Korea. Clin Exp Vaccine Res 2017; 6:31-37. [PMID: 28168171 PMCID: PMC5292354 DOI: 10.7774/cevr.2017.6.1.31] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/01/2016] [Accepted: 10/18/2016] [Indexed: 11/24/2022] Open
Abstract
Purpose Adverse events during mass vaccination campaigns have had a profoundly negative impact on vaccine coverage rates. The objective of the study was to identify the characteristics of reported psychogenic illness cases following mass vaccination that needed further interventions of the national immunization program. Materials and Methods We collected documents that were submitted to the Korea Centers for Disease Control and Prevention for vaccine injury compensation, and analyzed cases of psychogenic illness following pandemic influenza A (H1N1) vaccination in 2009 which were confirmed by the Korean Advisory Committee on Vaccine Injury Compensation. Results During the 2009-2010 influenza season, 13 million Koreans were vaccinated against pandemic influenza. Of 28 reported psychogenic illness cases following immunization, 25 were vaccinated through school-located mass immunization. Significant numbers of them were female adolescents (68%) or had underlying vulnerable conditions or emotional life stressors (36%). They required lengthy hospitalization (median, 7 days) and high medical costs (median, US $1,582 per case). Conclusion Health authorities and organizers of future mass vaccinations should be well aware of the possible occurrence of psychogenic illness, acknowledge their detailed characteristics, and take its economic burden into account to mitigate the risk of transmission of infectious diseases efficiently.
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Affiliation(s)
- Tae Un Yang
- Division of Vaccine-Preventable Diseases Control and National Immunization Program, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Hee Jung Kim
- Division of Vaccine-Preventable Diseases Control and National Immunization Program, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Yeon Kyeong Lee
- Division of Vaccine-Preventable Diseases Control and National Immunization Program, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Young-Joon Park
- Division of Vaccine-Preventable Diseases Control and National Immunization Program, Korea Centers for Disease Control and Prevention, Cheongju, Korea
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38
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Mertz D, Fadel SA, Lam PP, Tran D, Srigley JA, Asner SA, Science M, Kuster SP, Nemeth J, Johnstone J, Ortiz JR, Loeb M. Herd effect from influenza vaccination in non-healthcare settings: a systematic review of randomised controlled trials and observational studies. ACTA ACUST UNITED AC 2016; 21:30378. [PMID: 27784531 PMCID: PMC5291154 DOI: 10.2807/1560-7917.es.2016.21.42.30378] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 04/23/2016] [Indexed: 12/29/2022]
Abstract
Influenza vaccination programmes are assumed to have a herd effect and protect contacts of vaccinated persons from influenza virus infection. We searched MEDLINE, EMBASE, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), Global Health and the Cochrane Central Register of Controlled Trials (CENTRAL) from inception to March 2014 for studies assessing the protective effect of influenza vaccination vs no vaccination on influenza virus infections in contacts. We calculated odds ratios (ORs) and 95% confidence intervals (CIs) using a random-effects model. Of 43,082 screened articles, nine randomised controlled trials (RCTs) and four observational studies were eligible. Among the RCTs, no statistically significant herd effect on the occurrence of influenza in contacts could be found (OR: 0.62; 95% CI: 0.34–1.12). The one RCT conducted in a community setting, however, showed a significant effect (OR: 0.39; 95% CI: 0.26–0.57), as did the observational studies (OR: 0.57; 95% CI: 0.43–0.77). We found only a few studies that quantified the herd effect of vaccination, all studies except one were conducted in children, and the overall evidence was graded as low. The evidence is too limited to conclude in what setting(s) a herd effect may or may not be achieved.
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Affiliation(s)
- Dominik Mertz
- Department of Medicine, McMaster University, Hamilton, Canada
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A Feasibility Trial of Home Administration of Intranasal Vaccine by Parents to Eligible Children. Clin Ther 2016; 39:204-211.e4. [PMID: 27938896 DOI: 10.1016/j.clinthera.2016.11.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/10/2016] [Accepted: 12/16/2016] [Indexed: 11/23/2022]
Abstract
PURPOSE Intranasal vaccines are being developed for protection against many different infectious agents. The currently available intranasal live attenuated influenza vaccine (LAIV) is only approved for administration by medical personnel. We conducted a pilot study to investigate the feasibility of training parents to give LAIV to their own children. METHODS Subjects were recruited from several sources: a university-based outpatient clinic, university employee e-mail announcement, and direct referrals from study subjects. After confirming eligibility to receive LAIV, consented parents were trained by viewing a video with the study staff. LAIV was provided in a cooler with instructions to vaccinate within 24 hours. Telephone follow-up was conducted to confirm proper administration and to assess parental attitudes about home administration. At season's end, immunization registry and hospital records were reviewed to confirm no additional doses were given. FINDINGS Twenty-seven families with 41 children were enrolled. All participants successfully administered LAIV to their children, and all preferred or strongly preferred home administration to an office visit for getting vaccinated. Two families stated that without this option they would not have otherwise vaccinated their children. Adverse events were minor. All patients had their state vaccine registries accurately updated and none received duplicate doses. Upon review, no reimbursement was received for vaccination. IMPLICATIONS Home administration of intranasal LAIV was successful and well received. This option could be used in the future for LAIV or other intranasal vaccines as a way to increase vaccination rates and convenience for parents. ClinicalTrials.gov identifier: NCT01938170.
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40
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Matsuoka T, Sato T, Akita T, Yanagida J, Ohge H, Kuwabara M, Tanaka J. High Vaccination Coverage among Children during Influenza A(H1N1)pdm09 as a Potential Factor of Herd Immunity. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13101017. [PMID: 27763532 PMCID: PMC5086756 DOI: 10.3390/ijerph13101017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 11/24/2022]
Abstract
The objective of this study was to identify factors related to the expansion of infection and prevention of influenza A(H1N1)pdm09. A retrospective non-randomized cohort study (from June 2009 to May 2010) on influenza A(H1N1)pdm09 was conducted in a sample of residents from Hiroshima Prefecture, Japan. The cumulative incidence of the influenza A(H1N1)pdm09 and the pandemic vaccine effectiveness (VE) were estimated. The response rate was 53.5% (178,669/333,892). Overall, the odds ratio of non-vaccinated group to vaccinated group for cumulative incidence of influenza A(H1N1)pdm09 was 2.18 (95% confidence interval (CI): 2.13–2.23) and the VE was 43.9% (CI: 42.8–44.9). The expansion of infection, indicating the power of transmission from infected person to susceptible person, was high in the 7–15 years age groups in each area. In conclusion, results from this survey suggested that schoolchildren-based vaccination rate participates in determining the level of herd immunity to influenza and children might be the drivers of influenza transmission. For future pandemic preparedness, vaccination of schoolchildren may help to prevent disease transmission during influenza outbreak.
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Affiliation(s)
- Toshihiko Matsuoka
- Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan.
| | - Tomoki Sato
- Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan.
| | - Tomoyuki Akita
- Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan.
| | - Jiturou Yanagida
- Hiroshima City Funairi Citizens Hospital, Hiroshima 730-0844, Japan.
| | - Hiroki Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima 734-8551, Japan.
| | - Masao Kuwabara
- Hiroshima Prefectural Center for Disease Control and Prevention, Hiroshima 734-0007, Japan.
| | - Junko Tanaka
- Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan.
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41
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Caspard H, Coelingh KL, Mallory RM, Ambrose CS. Association of vaccine handling conditions with effectiveness of live attenuated influenza vaccine against H1N1pdm09 viruses in the United States. Vaccine 2016; 34:5066-5072. [PMID: 27613072 DOI: 10.1016/j.vaccine.2016.08.079] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 08/29/2016] [Indexed: 01/04/2023]
Abstract
PURPOSE This analysis examined potential causes of the lack of vaccine effectiveness (VE) of live attenuated influenza vaccine (LAIV) against A/H1N1pdm09 viruses in the United States (US) during the 2013-2014 season. Laboratory studies have demonstrated reduced thermal stability of A/California/07/2009, the A/H1N1pdm09 strain utilized in LAIV from 2009 through 2013-2014. METHODS Post hoc analyses of a 2013-2014 test-negative case-control (TNCC) effectiveness study investigated associations between vaccine shipping conditions and LAIV lot effectiveness. Investigational sites provided the LAIV lot numbers administered to each LAIV recipient enrolled in the study, and the vaccine distributor used by the site for commercially purchased vaccine. Additionally, a review was conducted of 2009-2014 pediatric observational TNCC effectiveness studies of LAIV, summarizing effectiveness by type/subtype, season, and geographic location. RESULTS From the 2013 to 2014 TNCC study, the proportion of LAIV recipients who tested positive for H1N1pdm09 was significantly higher among children who received a lot released between August 1 and September 15, 2013, compared with a lot shipped either earlier or later (21% versus 4%; P<0.01). A linear relationship was observed between the proportion of subjects testing positive for H1N1pdm09 and outdoor temperatures during truck unloading at distributors' central locations. The review of LAIV VE studies showed that in the 2010-2011 and 2013-2014 influenza seasons, no significant effectiveness of LAIV against H1N1pdm09 was demonstrated for the trivalent or quadrivalent formulations of LAIV in the US, respectively, in contrast to significant effectiveness against A/H3N2 and B strains during 2010-2014. CONCLUSIONS This study showed that the lack of VE observed with LAIV in the US against H1N1pdm09 viruses was associated with exposure of some LAIV lots to temperatures above recommended storage conditions during US distribution, and is likely explained by the increased susceptibility of the A/California/7/2009 (H1N1pdm09) LAIV strain to thermal degradation. CLINICAL TRIAL REGISTRY NCT01997450.
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Affiliation(s)
- Herve Caspard
- MedImmune, One MedImmune Way, Gaithersburg, MD 20878, USA.
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42
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Tran CH, Brew J, Johnson N, Ryan KA, Martin B, Cornett C, Caron B, Duncan RP, Small PA, Myers PD, Morris JG. Sustainability of school-located influenza vaccination programs in Florida. Vaccine 2016; 34:2737-44. [PMID: 27126875 DOI: 10.1016/j.vaccine.2016.04.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 04/06/2016] [Accepted: 04/07/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND School-located influenza vaccination (SLIV) programs are a promising strategy for increasing vaccination coverage among schoolchildren. However, questions of economic sustainability have dampened enthusiasm for this approach in the United States. We evaluated SLIV sustainability of a health department led, county-wide SLIV program in Alachua County, Florida. Based on Alachua's outcome data, we modeled the sustainability of SLIV programs statewide using two different implementation costs and at different vaccination rates, reimbursement amount, and Vaccines for Children (VFC) coverage. METHODS Mass vaccination clinics were conducted at 69 Alachua County schools in 2013 using VFC (for Medicaid and uninsured children) and non-VFC vaccines. Claims were processed after each clinic and submitted to insurance providers for reimbursement ($5 Medicaid and $47.04 from private insurers). We collected programmatic expenditures and volunteer hours to calculate fixed and variable costs for two different implementation costs (with or without in-kind costs included). We project program sustainability for Florida using publicly available county-specific student populations and health insurance enrollment data. RESULTS Approximately 42% (n=12,853) of pre-kindergarten - 12th grade students participated in the SLIV program in Alachua. Of the 13,815 doses provided, 58% (8042) were non-VFC vaccine. Total implementation cost was $14.95/dose or $7.93/dose if "in-kind" costs were not included. The program generated a net surplus of $24,221, despite losing $4.68 on every VFC dose provided to Medicaid and uninsured children. With volunteers, 99% of Florida counties would be sustainable at a 50% vaccination rate and average reimbursement amount of $3.25 VFC and $37 non-VFC. Without volunteers, 69% of counties would be sustainable at 50% vaccination rate if all VFC recipients were on Medicaid and its reimbursement increased from $5 to $10 (amount private practices receive). CONCLUSIONS AND RELEVANCE Key factors that contributed to the sustainability and success of an SLIV program are: targeting privately insured children and reducing administration cost through volunteers. Counties with a high proportion of VFC eligible children may not be sustainable without subsidies at $5 Medicaid reimbursement.
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Affiliation(s)
- Cuc H Tran
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States
| | - Joe Brew
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - Nicholas Johnson
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - Kathleen A Ryan
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States; College of Medicine, University of Florida, Gainesville, FL, United States
| | - Brittany Martin
- Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - Catherine Cornett
- Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - Brad Caron
- Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - R Paul Duncan
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | - Parker A Small
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States; College of Medicine, University of Florida, Gainesville, FL, United States
| | - Paul D Myers
- Florida Department of Health in Alachua County, Gainesville, FL, United States
| | - J Glenn Morris
- College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States; College of Medicine, University of Florida, Gainesville, FL, United States.
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Gicquelais RE, Safi H, Butler S, Smith N, Haselow DT. Association of School-Based Influenza Vaccination Clinics and School Absenteeism--Arkansas, 2012-2013. THE JOURNAL OF SCHOOL HEALTH 2016; 86:235-241. [PMID: 26930234 DOI: 10.1111/josh.12372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 06/18/2015] [Accepted: 04/09/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Influenza is a major cause of seasonal viral respiratory illness among school-aged children. Accordingly, the Arkansas Department of Health (ADH) coordinates >800 school-based influenza immunization clinics before each influenza season. We quantified the relationship between student influenza vaccination in Arkansas public schools and school absenteeism during the 2012-2013 influenza season. METHODS The relationship between the percent of students vaccinated in Arkansas public schools during ADH-facilitated clinics and the average daily percent of students absent from school during the 2012-2013 influenza season was quantified using linear regression modeling. The effect of increasing vaccination coverage among students on absentee days in the Arkansas public school system was estimated. RESULTS For every 1% higher vaccination coverage, 0.027% fewer absenteeism days were predicted. Larger school size was associated with higher absenteeism and predicted decreases in absenteeism were larger in magnitude for larger schools compared with smaller schools. Extrapolation of the model showed that a 10% higher vaccination level was associated with a reduction of 16-163 student absentee days per school over a 12-week influenza season. CONCLUSIONS Influenza vaccination is an effective tool to reduce school absenteeism. School-based clinics are a feasible way to target influenza vaccinations to school-aged children.
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Affiliation(s)
| | - Haytham Safi
- Arkansas Department of Health, 4815W Markham St, Little Rock, AR 72205.
| | - Sandra Butler
- Arkansas Department of Health, Little Rock, AR 72205.
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Abstract
BACKGROUND Obesity emerged as a novel risk factor for severe disease during the 2009 H1N1 influenza pandemic. Murine studies indicate that obesity is associated with ineffective response to influenza vaccine, but few human studies exist. We aimed to determine if influenza vaccine is protective against laboratory-confirmed influenza in obese children. METHODS Body mass index, vaccination status, and laboratory-confirmed influenza data were analyzed from a previously conducted prospective study in which active surveillance for influenza-like illness was conducted in 8 elementary schools in Los Angeles County during the 2010-2011 influenza season. Polymerase-chain reaction (PCR) was performed on combined nose/throat swabs collected from children with influenza-like illness at presentation to the school nurse or during absenteeism. RESULTS Of 4260 children with height/weight data, 1191 (28.0%) were obese (body mass index ≥95th percentile). Respiratory specimens were obtained from 858 (20.1%) children. Unvaccinated obese compared with vaccinated obese children acquired 3 times more PCR-confirmed influenza (62 vs. 17 per 1000 children, P = 0.003) and missed more school days (4.6 vs. 3.2 per 100 school days, P < 0.001) during influenza season. Obese children with PCR-confirmed influenza were more likely to present with cough (86.2 vs. 72.4%, P = 0.030) and missed more school per episode (2.4 vs.1.9 days, P = 0.023) compared with nonobese children. Among vaccinated children, rates of PCR-confirmed influenza were similar in obese and nonobese children (17 vs. 20 per 1000 children, P = 0.77). CONCLUSIONS Obese children with PCR-confirmed influenza suffered from more cough and missed more school days than their nonobese peers. Influenza vaccination protected obese children against PCR-proven influenza illness.
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Lineage-specific detection of influenza B virus using real-time polymerase chain reaction with melting curve analysis. Arch Virol 2016; 161:1425-35. [DOI: 10.1007/s00705-016-2802-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 02/19/2016] [Indexed: 11/25/2022]
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Chung JR, Flannery B, Thompson MG, Gaglani M, Jackson ML, Monto AS, Nowalk MP, Talbot HK, Treanor JJ, Belongia EA, Murthy K, Jackson LA, Petrie JG, Zimmerman RK, Griffin MR, McLean HQ, Fry AM. Seasonal Effectiveness of Live Attenuated and Inactivated Influenza Vaccine. Pediatrics 2016; 137:e20153279. [PMID: 26738884 PMCID: PMC4732363 DOI: 10.1542/peds.2015-3279] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/16/2015] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Few observational studies have evaluated the relative effectiveness of live attenuated (LAIV) and inactivated (IIV) influenza vaccines against medically attended laboratory-confirmed influenza. METHODS We analyzed US Influenza Vaccine Effectiveness Network data from participants aged 2 to 17 years during 4 seasons (2010-2011 through 2013-2014) to compare relative effectiveness of LAIV and IIV against influenza-associated illness. Vaccine receipt was confirmed via provider/electronic medical records or immunization registry. We calculated the ratio (odds) of influenza-positive to influenza-negative participants among those age-appropriately vaccinated with either LAIV or IIV for the corresponding season. We examined relative effectiveness of LAIV and IIV by using adjusted odds ratios (ORs) and 95% confidence intervals (CIs) from logistic regression. RESULTS Of 6819 participants aged 2 to 17 years, 2703 were age-appropriately vaccinated with LAIV (n = 637) or IIV (n = 2066). Odds of influenza were similar for LAIV and IIV recipients during 3 seasons (2010-2011 through 2012-2013). In 2013-2014, odds of influenza were significantly higher among LAIV recipients compared with IIV recipients 2 to 8 years old (OR 5.36; 95% CI, 2.37 to 12.13). Participants vaccinated with LAIV or IIV had similar odds of illness associated with influenza A/H3N2 or B. LAIV recipients had greater odds of illness due to influenza A/H1N1pdm09 in 2010-2011 and 2013-2014. CONCLUSIONS We observed lower effectiveness of LAIV compared with IIV against influenza A/H1N1pdm09 but not A(H3N2) or B among children and adolescents, suggesting poor performance related to the LAIV A/H1N1pdm09 viral construct.
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Affiliation(s)
- Jessie R. Chung
- Atlanta Research and Education Foundation, Inc, Atlanta, Georgia;,Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Brendan Flannery
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Mark G. Thompson
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Manjusha Gaglani
- Baylor Scott and White Health, Texas A&M University Health Science Center College of Medicine, Temple, Texas
| | | | - Arnold S. Monto
- University of Michigan School of Public Health, Department of Epidemiology, Ann Arbor, Michigan
| | - Mary Patricia Nowalk
- University of Pittsburgh Schools of Health Sciences and UPMC, Pittsburgh, Pennsylvania
| | | | - John J. Treanor
- Department of Medicine, University of Rochester Medical Center, Rochester, New York; and
| | | | - Kempapura Murthy
- Baylor Scott and White Health, Texas A&M University Health Science Center College of Medicine, Temple, Texas
| | | | - Joshua G. Petrie
- University of Michigan School of Public Health, Department of Epidemiology, Ann Arbor, Michigan
| | - Richard K. Zimmerman
- University of Pittsburgh Schools of Health Sciences and UPMC, Pittsburgh, Pennsylvania
| | | | - Huong Q. McLean
- Marshfield Clinic Research Foundation, Marshfield, Wisconsin
| | - Alicia M. Fry
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
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Gaglani M, Pruszynski J, Murthy K, Clipper L, Robertson A, Reis M, Chung JR, Piedra PA, Avadhanula V, Nowalk MP, Zimmerman RK, Jackson ML, Jackson LA, Petrie JG, Ohmit SE, Monto AS, McLean HQ, Belongia EA, Fry AM, Flannery B. Influenza Vaccine Effectiveness Against 2009 Pandemic Influenza A(H1N1) Virus Differed by Vaccine Type During 2013-2014 in the United States. J Infect Dis 2016; 213:1546-56. [PMID: 26743842 DOI: 10.1093/infdis/jiv577] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/13/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The predominant strain during the 2013-2014 influenza season was 2009 pandemic influenza A(H1N1) virus (A[H1N1]pdm09). This vaccine-component has remained unchanged from 2009. METHODS The US Flu Vaccine Effectiveness Network enrolled subjects aged ≥6 months with medically attended acute respiratory illness (MAARI), including cough, with illness onset ≤7 days before enrollment. Influenza was confirmed by reverse-transcription polymerase chain reaction (RT-PCR). We determined the effectiveness of trivalent or quadrivalent inactivated influenza vaccine (IIV) among subjects ages ≥6 months and the effectiveness of quadrivalent live attenuated influenza vaccine (LAIV4) among children aged 2-17 years, using a test-negative design. The effect of prior receipt of any A(H1N1)pdm09-containing vaccine since 2009 on the effectiveness of current-season vaccine was assessed. RESULTS We enrolled 5999 subjects; 5637 (94%) were analyzed; 18% had RT-PCR-confirmed A(H1N1)pdm09-related MAARI. Overall, the effectiveness of vaccine against A(H1N1)pdm09-related MAARI was 54% (95% confidence interval [CI], 46%-61%). Among fully vaccinated children aged 2-17 years, the effectiveness of LAIV4 was 17% (95% CI, -39% to 51%) and the effectiveness of IIV was 60% (95% CI, 36%-74%). Subjects aged ≥9 years showed significant residual protection of any prior A(H1N1)pdm09-containing vaccine dose(s) received since 2009, as did children <9 years old considered fully vaccinated by prior season. CONCLUSIONS During 2013-2014, IIV was significantly effective against A(H1N1)pdm09. Lack of LAIV4 effectiveness in children highlights the importance of continued annual monitoring of effectiveness of influenza vaccines in the United States.
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Affiliation(s)
- Manjusha Gaglani
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Jessica Pruszynski
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Kempapura Murthy
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Lydia Clipper
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Anne Robertson
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Michael Reis
- Baylor Scott & White Health, Texas A&M Health Science Center College of Medicine, Temple
| | - Jessie R Chung
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | | | | | | | | | | | - Joshua G Petrie
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor
| | - Suzanne E Ohmit
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor
| | - Arnold S Monto
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor
| | | | | | - Alicia M Fry
- Centers for Disease Control and Prevention, Atlanta, Georgia
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Cost effectiveness analysis of Year 2 of an elementary school-located influenza vaccination program-Results from a randomized controlled trial. BMC Health Serv Res 2015; 15:511. [PMID: 26573461 PMCID: PMC4647510 DOI: 10.1186/s12913-015-1169-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 11/09/2015] [Indexed: 11/10/2022] Open
Abstract
Background School-located vaccination against influenza (SLV-I) has the potential to improve current suboptimal influenza immunization coverage for U.S. school-aged children. However, little is known about SLV-I’s cost-effectiveness. The objective of this study is to establish the cost-effectiveness of SLV-I based on a two-year community-based randomized controlled trial (Year 1: 2009–2010 vaccination season, an unusual H1N1 pandemic influenza season, and Year 2: 2010–2011, a more typical influenza season). Methods We performed a cost-effectiveness analysis on a two-year randomized controlled trial of a Western New York SLV-I program. SLV-I clinics were offered in 21 intervention elementary schools (Year 1 n = 9,027; Year 2 n = 9,145 children) with standard-of-care (no SLV-I) in control schools (Year 1 n = 4,534 (10 schools); Year 2 n = 4,796 children (11 schools)). We estimated the cost-per-vaccinated child, by dividing the incremental cost of the intervention by the incremental effectiveness (i.e., the number of additionally vaccinated students in intervention schools compared to control schools). Results In Years 1 and 2, respectively, the effectiveness measure (proportion of children vaccinated) was 11.2 and 12.0 percentage points higher in intervention (40.7 % and 40.4 %) than control schools. In year 2, the cost-per-vaccinated child excluding vaccine purchase ($59.88 in 2010 US $) consisted of three component costs: (A) the school costs ($8.25); (B) the project coordination costs ($32.33); and (C) the vendor costs excluding vaccine purchase ($16.68), summed through Monte Carlo simulation. Compared to Year 1, the two component costs (A) and (C) decreased, while the component cost (B) increased in Year 2. The cost-per-vaccinated child, excluding vaccine purchase, was $59.73 (Year 1) and $59.88 (Year 2, statistically indistinguishable from Year 1), higher than the published cost of providing influenza vaccination in medical practices ($39.54). However, taking indirect costs (e.g., averted parental costs to visit medical practices) into account, vaccination was less costly in SLV-I ($23.96 in Year 1, $24.07 in Year 2) than in medical practices. Conclusions Our two-year trial’s findings reinforced the evidence to support SLV-I as a potentially favorable system to increase childhood influenza vaccination rates in a cost-efficient way. Increased efficiencies in SLV-I are needed for a sustainable and scalable SLV-I program.
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Vaccination Programs for Endemic Infections: Modelling Real versus Apparent Impacts of Vaccine and Infection Characteristics. Sci Rep 2015; 5:15468. [PMID: 26482413 PMCID: PMC4611864 DOI: 10.1038/srep15468] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 09/21/2015] [Indexed: 11/09/2022] Open
Abstract
Vaccine effect, as measured in clinical trials, may not accurately reflect population-level impact. Furthermore, little is known about how sensitive apparent or real vaccine impacts are to factors such as the risk of re-infection or the mechanism of protection. We present a dynamic compartmental model to simulate vaccination for endemic infections. Several measures of effectiveness are calculated to compare the real and apparent impact of vaccination, and assess the effect of a range of infection and vaccine characteristics on these measures. Although broadly correlated, measures of real and apparent vaccine effectiveness can differ widely. Vaccine impact is markedly underestimated when primary infection provides partial natural immunity, when coverage is high and when post-vaccination infectiousness is reduced. Despite equivalent efficacy, 'all or nothing' vaccines are more effective than 'leaky' vaccines, particularly in settings with high risk of re-infection and transmissibility. Latent periods result in greater real impacts when risk of re-infection is high, but this effect diminishes if partial natural immunity is assumed. Assessments of population-level vaccine effects against endemic infections from clinical trials may be significantly biased, and vaccine and infection characteristics should be considered when modelling outcomes of vaccination programs, as their impact may be dramatic.
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Coelingh K, Olajide IR, MacDonald P, Yogev R. Efficacy and effectiveness of live attenuated influenza vaccine in school-age children. Expert Rev Vaccines 2015; 14:1331-46. [PMID: 26372891 DOI: 10.1586/14760584.2015.1078732] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Evidence of high efficacy of live attenuated influenza vaccine (LAIV) from randomized controlled trials is strong for children 2-6 years of age, but fewer data exist for older school-age children. We reviewed the published data on efficacy and effectiveness of LAIV in children ≥5 years. QUOSA (Elsevier database) was searched for articles published from January 1990 to June 2014 that included 'FluMist', 'LAIV', 'CAIV', 'cold adapted influenza vaccine', 'live attenuated influenza vaccine', 'live attenuated cold adapted' or 'flu mist'. Studies evaluated included randomized controlled trials, effectiveness and indirect protection studies. This review demonstrates that LAIV has considerable efficacy and effectiveness in school-age children.
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Affiliation(s)
| | | | | | - Ram Yogev
- c 3 Ann & Robert Lurie Children's Hospital of Chicago, Chicago, IL, USA
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