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Leng SX, Shaw AC. Fundamental and frontier research of immune responses to influenza vaccines in human aging: from cross-sectional and longitudinal studies to clinical trials and the geroscience perspective. Immun Ageing 2023; 20:69. [PMID: 38031077 PMCID: PMC10685665 DOI: 10.1186/s12979-023-00392-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 11/08/2023] [Indexed: 12/01/2023]
Affiliation(s)
- Sean X Leng
- Division of Geriatric Medicine and Gerontology, Department of Medicine, Johns Hopkins Center on Aging and Immune Remodeling, Department of Molecular Microbiology and Immunology, Johns Hopkins University School of Medicine, Johns Hopkins Bloomberg School of Public Health, JHAAC Room 1A.38A, 5501 Hopkins Bayview Circle, Baltimore, MD, 21224, USA.
| | - Albert C Shaw
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
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Du Y, Jin C, Jit M, Chantler T, Lin L, Larson HJ, Li J, Gong W, Yang F, Ren N, Cheng W, Zhou Y, Tang W, Tucker JD, Wu D. Influenza vaccine uptake among children and older adults in China: a secondary analysis of a quasi-experimental study. BMC Infect Dis 2023; 23:225. [PMID: 37055738 PMCID: PMC10098986 DOI: 10.1186/s12879-023-08145-8] [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: 06/21/2022] [Accepted: 03/09/2023] [Indexed: 04/15/2023] Open
Abstract
BACKGROUND Influenza vaccination is the key to prevent influenza-related disease, especially among high-risk populations. However, influenza vaccine uptake in China is low. This secondary analysis of a quasi-experimental trial aimed to understand factors associated with influenza vaccine uptake among children and older people stratified by funding context. METHODS A total of 225 children (aged 0.5-8 years) and 225 older people (aged 60 years or above) were recruited from three clinics (rural, suburban and urban) in Guangdong Province. Participants were allocated into two groups based on funding contexts: a self-paid group (N = 150, 75 children and 75 older adults) in which participants paid full price for their vaccination; and a subsidized group (N = 300, 150 children and 150 older adults) in which varying levels of financial support was provided. Univariate and multivariable logistic regressions were conducted stratified by funding contexts. RESULTS Overall, 75.0% (225/300) of participants in the subsidized group and 36.7% (55/150) in the self-paid group got vaccinated. Older adults had lower vaccination rates than children in both funding groups, while both age groups showed much higher uptake in the subsidized group than in the self-paid group (aOR = 5.96, 95% CI: 3.77-9.42, p = 0.001). In the self-paid group, having prior influenza vaccination history of children (aOR:2.61, 95%CI: 1.06-6.42) or older people (aOR:4.76, 95%CI: 1.08-20.90) was associated with increased influenza vaccine uptake compared to those who had no prior vaccination experiences in the family. While in the subsidized group, participants who got married or lived with partners (aOR = 0.32, 0.10-0.98) had lower vaccination uptake than single ones. Trust in providers' advice (aOR = 4.95, 95%CI:1.99, 12.43), perceived effectiveness of the vaccine (aOR: 12.18, 95%CI: 5.21-28.50), and experienced influenza-like illnesses in the family in the past year (aOR = 46.52, 4.10, 533.78) were associated with higher vaccine uptake. CONCLUSIONS Older people had suboptimal vaccine uptake compared to children in both contexts and need more attention to enhance influenza vaccination. Tailoring interventions to different vaccine funding contexts may help improve influenza vaccination: In self-paid context, motivating people to accept their first ever influenza vaccination may be a promising strategy. In subsidized context, improving public confidence in vaccine effectiveness and providers' advice would be useful.
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Affiliation(s)
- Yumeng Du
- Institute for Healthcare Artificial Intelligence Application, Guangdong Second Provincial General Hospital, Guangzhou, China
- Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
- University of North Carolina at Chapel Hill Project-China, Guangzhou, China
| | - Chenqi Jin
- University of North Carolina at Chapel Hill Project-China, Guangzhou, China
- Dermatology Hospital of South Medical University, Guangzhou, China
| | - Mark Jit
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, New Territories, Hong Kong, China
| | - Tracey Chantler
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Leesa Lin
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, New Territories, Hong Kong, China
| | - Heidi J Larson
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Jing Li
- Department of Occupational and Environmental Health, West China School of Public Health, Sichuan University, Chengdu, China
| | - Wenfeng Gong
- China Country Office, Bill & Melinda Gates Foundation, Beijing, China
| | - Fan Yang
- Institute of Population Research, Peking University, Beijing, China
| | - Nina Ren
- Institute for Healthcare Artificial Intelligence Application, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Weibin Cheng
- Institute for Healthcare Artificial Intelligence Application, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Yi Zhou
- Zhuhai Center for Disease Control and Prevention, Zhuhai, China
| | - Weiming Tang
- Institute for Healthcare Artificial Intelligence Application, Guangdong Second Provincial General Hospital, Guangzhou, China
- University of North Carolina at Chapel Hill Project-China, Guangzhou, China
- Institute for Global Health and Infectious Diseases, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Joseph D Tucker
- Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
- University of North Carolina at Chapel Hill Project-China, Guangzhou, China
- Institute for Global Health and Infectious Diseases, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Dan Wu
- Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK.
- University of North Carolina at Chapel Hill Project-China, Guangzhou, China.
- Institute for Global Health and Infectious Diseases, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Clinical Research, London School of Hygiene & Tropical Medicine, Room 360, Keppel St, London, WC1E 7HT, UK.
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Pi Z, Aoyagi K, Arima K, Wu X, Ye Z, Jiang Y. Optimization of Elderly Influenza and Pneumococcal Immunization Programs in Beijing, China Using Health Economic Evaluations: A Modeling Study. Vaccines (Basel) 2023; 11:vaccines11010161. [PMID: 36680005 PMCID: PMC9863432 DOI: 10.3390/vaccines11010161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/04/2023] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
(1) Background: Currently, residents ≥ 60 and ≥65 years old in Beijing, China, are eligible for free influenza and pneumococcal polysaccharide vaccines (PPSV23), respectively. The present study aimed to assess the cost-effectiveness of current and alternative strategies of dual influenza and PPSV23 vaccination among the elderly in Beijing. (2) Methods: We developed a Markov state-transition model to compare the costs and the quality-adjusted life years (QALYs) associated with four influenza and PPSV23 vaccination strategies among the elderly in Beijing. The strategies were as follows: (1) no vaccination; (2) only flu vaccine for people ≥ 60 years old; (3) flu vaccine for people ≥ 60 years old and PPSV23 for people ≥ 65 years old; and (4) dual influenza vaccines and PPSV23 for people ≥ 60 years old. Incremental costs and QALYs were quantified to determine the optimal option. If dominant strategies emerged, the Chinese gross domestic product per capita in 2021 (80,976 CNY) was used as the willingness-to-pay (WTP) threshold to covert QALYs into the monetary equivalent. (3) Results: The current program saved costs and increased QALYs compared to no vaccination or flu vaccine-only strategies. However, extending free PPSV23 to people ≥ 60 years old saved 0.35 CNY additionally while increasing QALYs marginally compared with the current policy. Results were robust in all sensitivity analyses. (4) Conclusion: Beijing's current dual influenza and pneumococcal vaccination program was cost-effective among the elderly compared with the preceding policies of no vaccination and flu-only immunization programs. However, the program can further save money while enhancing the population health by extending PPSV23 to all people ≥ 60 years old.
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Affiliation(s)
- Zhenfei Pi
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Kiyoshi Aoyagi
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Kazuhiko Arima
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Xiaoliang Wu
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Zhaojia Ye
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Yawen Jiang
- School of Public Health (Shenzhen), Sun Yat-sen University, Room 533, West Wing of Medical Complex #1, 66 Gongchang Road, Guangming District, Shenzhen 518107, China
- Correspondence: ; Tel.: +86-13632974660
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Jiang Y, Ye Z, Chen D, Shu Y. Dual influenza and pneumococcal vaccination was associated with lower short-term risks of all-cause and acute respiratory hospitalizations among the elderly in Shenzhen, China: a retrospective cohort study. Emerg Microbes Infect 2021; 9:2578-2587. [PMID: 33215981 PMCID: PMC7734018 DOI: 10.1080/22221751.2020.1854624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The present study evaluated the real-world effectiveness of influenza and pneumococcal dual-vaccination among Chinese elderly, the evidence on which was absent. Outpatient and inpatient claims databases from Jan 1, 2015 to Apr 1, 2017 of persons at least 60 years old in Shenzhen, China were merged with electronic records of influenza vaccines and 23-valent pneumococcal polysaccharide vaccines (PPSV23) from Oct 1, 2016 - May 31, 2017. Individuals who were vaccinated with influenza between Nov 1 and Dec 31, 2016 and received PPSV23 30 days within the date of influenza vaccination were defined as the vaccinated group. A control group consisted of individuals that received neither of the vaccines was constructed by matching on year of birth, sex, and district. The two outcomes were all-cause and acute respiratory hospitalizations. Difference-in-difference (DiD) logistic regressions that were proceeded with an entropy balancing (EB) process were used to analyse the effectiveness of dual-vaccination. A total of 48,116 eligible individuals were identified in the vaccinated group, which were matched by 93,692 individuals in the control group. The EB-DiD analyses estimated that dual-vaccination was associated with lower short-term risks of all-cause (odds ratio: 0.59, CI: 0.55-0.63) and acute respiratory (odds ratio: 0.49, CI: 0.41-0.59) hospitalizations.
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Affiliation(s)
- Yawen Jiang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, People's Republic of China
| | - Zhaojia Ye
- Shenzhen Center for Disease Control and Prevention, Shenzhen, People's Republic of China
| | - Daqin Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, People's Republic of China
| | - Yuelong Shu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, People's Republic of China
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Cheng Y, Cao X, Cao Z, Xu C, Sun L, Gao Y, Wang Y, Li S, Wu C, Li X, Wang Y, Leng SX. Effects of influenza vaccination on the risk of cardiovascular and respiratory diseases and all-cause mortality. Ageing Res Rev 2020; 62:101124. [PMID: 32683040 PMCID: PMC7365105 DOI: 10.1016/j.arr.2020.101124] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 07/06/2020] [Accepted: 07/14/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Influenza vaccination is a simple strategy recommended for the prevention of influenza infection and its complications. This meta-analysis aimed to provide current supportive evidence for the breadth and validity of the observed protective effects of influenza vaccination on cardiovascular and respiratory adverse outcomes and all-cause mortality in older adults and in general adult population. METHODS We searched PubMed, Embase, Web of Science, and the Cochrane Library to identify all published studies comparing influenza vaccination with placebo from the database inception to November 11, 2018. These included studies reporting the associations of influenza vaccination with the risk of aforementioned adverse outcomes. RESULTS The pooled adjusted relative risks among influenza-vaccinated people relative to unvaccinated people for the outcomes of interest were 0.74 (95 % confidence interval [CI] = 0.70-0.78) for cardiovascular diseases (63 studies), 0.82 (95 % CI = 0.75-0.91) for respiratory diseases (29 studies), and 0.57 (95 % CI = 0.51-0.63) for all-cause mortality (43 studies). We performed subgroup analysis of age, sex, and region/country and found that these protective effects were evident in the general adult population and particularly robust in older adults and in those with pre-existing specific diseases. CONCLUSION Influenza vaccine is associated with a significant risk reduction of cardiovascular and respiratory adverse outcomes as well as all-cause mortality. Such a preventative measure can benefit the general population as well as those in old age and with pre-existing specific diseases.
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