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Dagnew AF. Is there a need for an alternative varicella vaccine? THE LANCET. INFECTIOUS DISEASES 2024; 24:804-806. [PMID: 38614118 DOI: 10.1016/s1473-3099(24)00218-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 03/21/2024] [Indexed: 04/15/2024]
Affiliation(s)
- Alemnew F Dagnew
- Clinical Development, Bill & Melinda Gates Medical Research Institute, Cambridge, MA 02139, USA.
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2
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Han R, Gomez JA, de Veras B, Pinto T, Guzman-Holst A, Nieto J, van Oorschot DAM. How large could the public health impact of introducing recombinant zoster vaccination for people aged ≥50 years in five Latin American countries be? Hum Vaccin Immunother 2023; 19:2164144. [PMID: 36821856 PMCID: PMC10026900 DOI: 10.1080/21645515.2022.2164144] [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] [Indexed: 02/25/2023] Open
Abstract
This study aimed to: (1) estimate the disease burden of herpes zoster (HZ) and (2) assess the potential public health impact of introducing adjuvanted recombinant zoster vaccine (RZV) compared with no vaccination in adults aged ≥50 years in Argentina, Brazil, Mexico, Chile, and Colombia using the ZOster ecoNomic Analysis (ZONA) static multicohort Markov model. The model followed individuals aged ≥50 years from administration of RZV over their remaining lifetime. Inputs were based, most often, on local data. First dose coverage was assumed to be 35%, with 75% second dose compliance. It was predicted that without RZV, there would be 23,558,675 HZ cases, 6,115,981 post-herpetic neuralgia (PHN) cases, and 7,058,779 non-PHN complications in the five countries, but introducing RZV under assumed coverage could avoid 4,583,787 (19%) HZ cases, 1,130,751 (18%) PHN cases, and 1,373,419 (19%) non-PHN complications. Also, 10427,504 (20%) doctor's office visits and 1,630,201 (19%) days of hospitalization could be averted in the three countries (Argentina, Brazil, and Mexico) with available input data. The numbers needed to be vaccinated to avoid one case of HZ were 9-10 across countries, and to avoid one case of PHN, 35-40. One-way sensitivity analyses showed that the input parameters with the largest impact on the estimated number of HZ cases avoided were first dose coverage, initial HZ incidence, and vaccine efficacy waning. In conclusion, the introduction of RZV for older adults in Latin America could greatly reduce the public health burden of HZ and reduce the related doctor visits and hospitalization days.
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Affiliation(s)
- Ru Han
- Value Evidence Outcome Department, GSK, Wavre, Belgium
| | - Jorge A Gomez
- Value Evidence Outcome Department, GSK, Buenos Aires, Argentina
| | - Bruna de Veras
- Value Evidence Outcome Department, GSK, Rio de Janeiro, Brazil
| | | | | | - Javier Nieto
- Medical Affairs Department, GSK, Panama City, Panama
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Uda K, Okubo Y, Tsuge M, Tsukahara H, Miyairi I. Impacts of routine varicella vaccination program and COVID-19 pandemic on varicella and herpes zoster incidence and health resource use among children in Japan. Vaccine 2023; 41:4958-4966. [PMID: 37400282 DOI: 10.1016/j.vaccine.2023.06.054] [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: 04/07/2023] [Revised: 05/24/2023] [Accepted: 06/15/2023] [Indexed: 07/05/2023]
Abstract
PURPOSE To determine the epidemiological trends in pediatric varicella and herpes zoster incidence and changes in healthcare resource use from 2005 to 2022 using a nationally representative database in Japan. MATERIALS AND METHODS We conducted a retrospective observational study consisting of 3.5 million children with 177 million person-months during 2005-2022 using Japan Medical Data Center (JMDC) claims database in Japan. We investigated trends in incidence rates of varicella and herpes zoster and changes in healthcare resource use (e.g., antiviral use, office visits, and healthcare costs) over 18 years. Interrupted time-series analyses were used to investigate the impact of the routine varicella vaccination program in 2014 and infection prevention measures against COVID-19 on incidence rates of varicella and herpes zoster and related healthcare utilization. RESULTS After the introduction of the routine immunization program in 2014, we observed level changes in incidence rates (45.6 % reduction [95 %CI, 32.9-56.0] of varicella cases, antiviral use (40.9 % reduction [95 %CI, 25.1-53.3]), and relevant healthcare costs (48.7 % reduction [95 %CI, 38.2-57.3]). Furthermore, infection prevention measures against COVID-19 were associated with additional level changes in varicella rates (57.2 % reduction [95 %CI, 44.5-67.1]), antiviral use (65.7 % reduction [59.7-70.8]), and healthcare costs (49.1 % [95 %CI, 32.7-61.6]). In contrast, the changes in incidence and healthcare costs for herpes zoster were relatively small, which showed 9.4 % elevated level change with a decreasing trend and 8.7 % reduced level change with a decreasing trend after the vaccine program and the COVID-19 pandemic. The cumulative incidence of herpes zoster in children born after 2014 was lower than that before 2014. CONCLUSIONS Varicella incidence and healthcare resource use were largely affected by the routine immunization program and infection prevention measures against COVID-19, while these impacts on herpes zoster were relatively small. Our study indicates that immunization and infection prevention measures largely changed pediatric infectious disease practices.
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Affiliation(s)
- Kazuhiro Uda
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Yusuke Okubo
- Department of Social Medicine, National Center for Child Health and Development, Tokyo, Japan.
| | - Mitsuru Tsuge
- Department of Pediatric Acute Diseases, Academic Field of Medicine, Dentistry, and Pharmaceutical Science, Okayama University, Okayama, Japan
| | - Hirokazu Tsukahara
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Isao Miyairi
- Department of Pediatrics, Hamamatsu University School of Medicine, Shizuoka, Japan; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, TN, USA
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Burgess C, Samant S, leFevre T, Schade Larsen C, Pawaskar M. Universal varicella vaccination in Denmark: Modeling public health impact, age-shift, and cost-effectiveness. PLOS GLOBAL PUBLIC HEALTH 2023; 3:e0001743. [PMID: 37018165 PMCID: PMC10075481 DOI: 10.1371/journal.pgph.0001743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 03/01/2023] [Indexed: 04/06/2023]
Abstract
We modeled the long-term clinical and economic impact of two-dose universal varicella vaccination (UVV) strategies in Denmark using a dynamic transmission model. The cost-effectiveness of UVV was evaluated along with the impact on varicella (including age-shift) and herpes zoster burden. Six two-dose UVV strategies were compared to no vaccination, at either short (12/15 months) or medium (15/48 months) intervals. Monovalent vaccines (V-MSD or V-GSK) for the 1st dose, and either monovalent or quadrivalent vaccines (MMRV-MSD or MMRV-GSK) for the 2nd dose were considered. Compared to no vaccination, all two-dose UVV strategies reduced varicella cases by 94%-96%, hospitalizations by 93%-94%, and deaths by 91%-92% over 50 years; herpes zoster cases were also reduced by 9%. There was a decline in the total number of annual varicella cases in all age groups including adolescents and adults. All UVV strategies were cost-effective compared to no vaccination, with ICER values ranging from €18,228-€20,263/QALY (payer perspective) and €3,746-€5,937/QALY (societal perspective). The frontier analysis showed that a two-dose strategy with V-MSD (15 months) and MMRV-MSD (48 months) dominated all other strategies and was the most cost-effective. In conclusion, all modeled two-dose UVV strategies were projected to substantially reduce the clinical and economic burden of varicella disease in Denmark compared to the current no vaccination strategy, with declines in both varicella and zoster incidence for all age groups over a 50-year time horizon.
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Affiliation(s)
| | - Salome Samant
- Merck & Co., Inc., Rahway, NJ, United States of America
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Rodrigues F, Marlow R, Gouveia C, Correia P, Brett A, Silva C, Gameiro I, Rua I, Dias J, Martins M, Diogo R, Lopes T, Hipólito E, Moreira D, Costa Alves M, Prata F, Labrusco M, Gomes S, Fernandes A, Andrade A, Granjo Morais C, João Virtuoso M, Manuel Zarcos M, Teresa Raposo A, Boon A, Finn A. Prospective study of loss of health-related quality adjusted life years in children and their families due to uncomplicated and hospitalised varicella. Vaccine 2023; 41:1182-1189. [PMID: 36522267 DOI: 10.1016/j.vaccine.2022.12.011] [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: 09/16/2022] [Revised: 11/06/2022] [Accepted: 12/01/2022] [Indexed: 12/15/2022]
Abstract
INTRODUCTION AND AIMS Although usually benign, varicella can lead to serious complications and sometimes long-term sequelae. Vaccines are safe and effective but not yet included in immunisation programmes in many countries. We aimed to quantify the impact on health-related quality of life (HRQoL) in terms of quality-adjusted life years (QALY) in children with varicella and their families, key to assessing cost-utility in countries with low mortality due to this infection. METHODS Children with varicella in the community and admitted to hospitals in Portugal were included over 18 months from January 2019. Children's and carers' HRQoL losses were assessed prospectively using standard multi-attribute utility instruments for measuring HRQoL (EQ-5D and CHU9D), from presentation to recovery, allowing the calculation of QALYs. RESULTS Among 109 families with children with varicella recruited from attendees at a pediatric emergency service (community arm), the mean HRQoL loss/child was 2.0 days (95 % CI 1.9-2.2, n = 101) (mean 5.4 QALYs/1000 children (95 % CI 5.3-6.1) and 1.3 days/primary carer (95 % CI 1.2-1.6, n = 103) (mean 3.6 QALYs /1000 carers (95 % CI 3.4-4.4). Among 114 families with children admitted to hospital because of severe varicella or a complication (hospital arm), the mean HRQoL loss/child was 9.8 days (95 % CI 9.4-10.6, n = 114) (mean 26.8 QALYs /1000 children (95 % CI 25.8-29.0) and 8.5 days/primary carer (95 % CI 7.4-9.6, n = 114) (mean 23.4 QALYs/1000 carers (95 % CI 20.3-26.2). Mean QALY losses/1000 patients were particularly high for bone and joint infections [67.5 (95 % CI 43.9-97.6)]. Estimates for children's QALYs lost using the CHU9D tool were well correlated with those obtained using EQ-5D, but substantially lower. CONCLUSIONS The impact of varicella on HRQoL is substantial. We report the first measurements of QALYs lost in hospitalised children and in the families of children both in the community and admitted to hospital, providing important information to guide vaccination policy recommendations.
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Affiliation(s)
- Fernanda Rodrigues
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal; Faculdade de Medicina, Universidade de Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
| | - Robin Marlow
- Bristol Vaccine Centre, Schools of Population Health Sciences and of Cellular and Molecular Medicine, University of Bristol, BS2 8AE, UK
| | - Catarina Gouveia
- Hospital D. Estefânia, Centro Hospitalar Lisboa Central, Rua Jacinta Marto, 1150-191 Lisboa, Portugal
| | - Paula Correia
- Hospital Prof. Doutor Fernando Fonseca, IC 19, 2720-276 Amadora, Portugal
| | - Ana Brett
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal; Faculdade de Medicina, Universidade de Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Catarina Silva
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Inês Gameiro
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Inês Rua
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - João Dias
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Marta Martins
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Rui Diogo
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Teresa Lopes
- Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Av. Afonso Romão, 3000-602 Coimbra, Portugal
| | - Elsa Hipólito
- Hospital Infante D. Pedro, Av. Dr. Artur Ravara, 3810-164 Aveiro, Portugal
| | - Diana Moreira
- Centro Hospitalar de Vila Nova de Gaia/Espinho (Unidade 2), Rua Dr. Francisco Sá Carneiro, 4400-129 Vila Nova de Gaia, Portugal
| | - Manuela Costa Alves
- Hospital de Braga, Rua das Comunidades Lusíadas 133, 4710-243 Braga, Portugal
| | - Filipa Prata
- Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Av. Prof. Egas Moniz, 1649-028 Lisboa, Portugal
| | - Miguel Labrusco
- Hospital Beatriz Ângelo, Av. Carlos Teixeira, 2674-514 Loures, Portugal
| | - Susana Gomes
- Hospital do Espírito Santo, Largo Senhor da Pobreza, 7000-811 Évora, Portugal
| | - Alexandre Fernandes
- Centro Materno Infantil do Norte, Largo da Maternidade de Júlio Dinis, 4050-651 Porto, Portugal
| | - Alexandra Andrade
- Hospital Nélio Mendonça, Av. Luís de Camões 6180, 9000-177 Funchal, Portugal
| | - Catarina Granjo Morais
- Centro Hospitalar e Universitário de S. João, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Maria João Virtuoso
- Hospital de Faro, Centro Hospitalar e Universitário do Algarve, Rua Leão Penedo, 8000-386 Faro, Portugal
| | - Maria Manuel Zarcos
- Hospital de Santo André, Centro Hospitalar Leiria Pombal, Rua de Santo André, 2410-197 Leiria, Portugal
| | - Ana Teresa Raposo
- Hospital do Divino Espírito Santo, Av. D. Manuel I, 9500-370 Ponta Delgada, Portugal
| | - Adam Boon
- Bristol Vaccine Centre, Schools of Population Health Sciences and of Cellular and Molecular Medicine, University of Bristol, BS2 8AE, UK
| | - Adam Finn
- Bristol Vaccine Centre, Schools of Population Health Sciences and of Cellular and Molecular Medicine, University of Bristol, BS2 8AE, UK
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Leung J, Dooling K, Marin M, Anderson TC, Harpaz R. The Impact of Universal Varicella Vaccination on Herpes Zoster Incidence in the United States: Comparison of Birth Cohorts Preceding and Following Varicella Vaccination Program Launch. J Infect Dis 2022; 226:S470-S477. [PMID: 36265856 DOI: 10.1093/infdis/jiac255] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
When the US varicella vaccination program was introduced in 1995, its impacts on the epidemiology of herpes zoster (HZ) were not precisely known. We used a large claims database to examine HZ incidence in the US during 1998-2019 among persons aged ≥30 years (the prevaccine cohort, born before 1990), and aged 1-29 years (includes the postvaccine cohort, born since 1990). We defined incident HZ as the first instance of an outpatient or emergency department (ED) claim with an HZ diagnostic code. Additionally, we examined the proportion of HZ visits among all ED visits as a complementary method to assess for healthcare-seeking artifacts in the findings. In persons aged ≥30 years (prevaccine cohort), we observed age-specific increases in HZ incidence during the earlier study years, with decelerations in later years, starting in 2007 with oldest age groups. Similar patterns were seen when we examined HZ visits as a proportion of all ED visits. For persons aged 1-29 years, age-specific HZ incidence increased early in the study period for the oldest age groups who were born prevaccine, but later declined in a stepwise pattern once each age group was comprised of persons born in the postvaccine period. Our results, corroborated with previously published studies, do not support prior modeling predictions that the varicella vaccination program would increase HZ incidence among adult cohorts who previously experienced varicella. Our findings also suggest that continued declines in age-specific HZ incidence as varicella-vaccinated cohorts age are likely.
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Affiliation(s)
- Jessica Leung
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kathleen Dooling
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Mona Marin
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Tara C Anderson
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Zhou F, Leung J, Marin M, Dooling KL, Anderson TC, Ortega-Sanchez IR. Health and Economic Impact of the United States Varicella Vaccination Program, 1996-2020. J Infect Dis 2022; 226:S463-S469. [PMID: 36265847 PMCID: PMC10941259 DOI: 10.1093/infdis/jiac271] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The aim of this study was to evaluate the health and economic impact of the varicella vaccination program on varicella disease in the United States (US), 1996-2020. METHODS Analysis was conducted using the Centers for Disease Control and Prevention or published annual population-based varicella incidence, and varicella-associated hospitalization, outpatient visit, and mortality rates in the US population aged 0-49 years during 1996-2020 (range, 199.5-214.2 million persons) compared to before vaccination (1990-1994). Disease costs were estimated using the societal perspective. Vaccination program costs included costs of vaccine, administration, postvaccination adverse events, and travel and work time lost to obtain vaccination. All costs were adjusted to 2020 US dollars using a 3% annual discount rate. The main outcome measures were the number of varicella-associated cases, hospitalizations, hospitalization days, and premature deaths prevented; life-years saved; and net societal savings from the US varicella vaccination program. RESULTS Among US persons aged 0-49 years, during 1996-2020, it is estimated that more than 91 million varicella cases, 238 000 hospitalizations, 1.1 million hospitalization days, and almost 2000 deaths were prevented and 118 000 life-years were saved by the varicella vaccination program, at net societal savings of $23.4 billion. CONCLUSIONS Varicella vaccination has resulted in substantial disease prevention and societal savings for the US over 25 years of program implementation.
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Affiliation(s)
- Fangjun Zhou
- Immunization Services Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jessica Leung
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Mona Marin
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Kathleen L. Dooling
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Tara C. Anderson
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Ismael R. Ortega-Sanchez
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
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Drees M, Weber DJ. Prevention and Control of Nosocomial Varicella During the United States Varicella Vaccination Program Era. J Infect Dis 2022; 226:S456-S462. [PMID: 36265849 DOI: 10.1093/infdis/jiac254] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
Abstract
The United States varicella vaccination program has successfully reduced varicella incidence and hospitalizations by ≥90%, consequently reducing the risk of nosocomial exposures. However, patients and healthcare personnel (HCP) continue to introduce varicella zoster virus (VZV) into healthcare settings. Herpes zoster (HZ) is less contagious than varicella, but it can also result in exposures. Unrecognized varicella and HZ may lead to extensive contact investigations, control efforts, and HCP furloughs that result in significant disruption of healthcare activities as well as substantial costs. Robust occupational health and infection prevention programs that ensure healthcare personnel immunity and prompt recognition and isolation of patients with varicella or HZ will lower the risk of VZV transmission and reduce or eliminate the need to furlough exposed HCP and associated costs.
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Affiliation(s)
- Marci Drees
- Department of Medicine, ChristianaCare, Wilmington, Delaware, USA.,Department of Medicine, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - David J Weber
- Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
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Silent Reactivation of Varicella Zoster Virus in Pregnancy: Implications for Maintenance of Immunity to Varicella. Viruses 2022; 14:v14071438. [PMID: 35891418 PMCID: PMC9318610 DOI: 10.3390/v14071438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/01/2022] [Accepted: 06/22/2022] [Indexed: 02/01/2023] Open
Abstract
We encountered two cases of varicella occurring in newborn infants. Because the time between birth and the onset of the illness was much shorter than the varicella incubation period, the cases suggested that the infection was maternally acquired, despite the fact that neither mother experienced clinical zoster. Thus, we tested the hypothesis that VZV frequently reactivates asymptomatically in late pregnancy. The appearance of DNA-encoding VZV genes in saliva was used as an indicator of reactivation. Saliva was collected from 5 women in the first and 14 women in the third trimesters of pregnancy and analyzed at two different sites, at one using nested PCR and at the other using quantitative PCR (qPCR). No VZV DNA was detected at either site in the saliva of women during the first trimester; however, VZV DNA was detected in the majority of samples of saliva (11/12 examined by nested PCR; 7/10 examined by qPCR) during the third trimester. These observations suggest that VZV reactivation occurs commonly during the third trimester of pregnancy. It is possible that this phenomenon, which remains in most patients below the clinical threshold, provides an endogenous boost to immunity and, thus, is beneficial.
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10
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Sun Y, Huang L, Nie J, Feng K, Liu Y, Bai Z. Development of a perfusion process for serum-free adenovirus vector herpes zoster vaccine production. AMB Express 2022; 12:58. [PMID: 35567723 PMCID: PMC9107214 DOI: 10.1186/s13568-022-01398-7] [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: 04/26/2022] [Accepted: 05/04/2022] [Indexed: 11/10/2022] Open
Abstract
Herpes zoster is caused by reactivation of the varicella zoster virus (VZV). Researching and developing a herpes zoster vaccine will help to decrease the incidence of herpes zoster. To increase the bioreactor productivity, a serum-free HEK293 cell perfusion process with adenovirus vector herpes zoster (rAd-HZ) vaccine production was developed efficiently using the design of experiment (DoE) method. First, serum-free media for HEK293 cells were screened in both batch and semi-perfusion culture modes. Then, three optimal media were employed in a medium mixture design to improve cell culture performance, and the 1:1 mixture of HEK293 medium and MCD293 medium (named HM293 medium) was identified as the optimal formulation. On the basis of the HM293 medium, the relationship of critical process parameters (CPPs), including the time of infection (TOI), multiplicity of infection (MOI), pH, and critical quality attributes (CQAs) (adenovirus titer (Titer), cell-specific virus yield (CSVY), adenovirus fold expansion (Fold)) of rAd-HZ production was investigated using the DoE approach. Furthermore, the robust setpoint and design space of these CPPs were explored. Finally, the rAd-HZ production process with parameters at a robust setpoint (TOI = 7.2 × 106 cells/mL, MOI = 3.7, and pH = 7.17) was successfully scaled-up to a 3-L bioreactor with an alternating tangential flow system, yielding an adenovirus titer of 3.0 × 1010 IFU/mL, a CSVY of 4167 IFU/cells, a Fold of 1117 at 2 days post infection (dpi). The DoE approach accelerated the development of a HEK293 serum-free medium and of a robust adenovirus production process.
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11
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Wang W, Pan D, Cheng T, Zhu H. Rational Design of a Skin- and Neuro-Attenuated Live Varicella Vaccine: A Review and Future Perspectives. Viruses 2022; 14:848. [PMID: 35632591 PMCID: PMC9144592 DOI: 10.3390/v14050848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/21/2022] Open
Abstract
Primary varicella-zoster virus (VZV) infection causes varicella, which remains a prominent public health concern in children. Current varicella vaccines adopt the live-attenuated Oka strain, vOka, which retains the ability to infect neurons, establish latency and reactivate, leading to vaccine-associated zoster in some vaccinees. Therefore, it is necessary to develop a safer next-generation varicella vaccine to help reduce vaccine hesitancy. This paper reviews the discovery and identification of the skin- and neuro-tropic factor, the open reading frame 7 (ORF7) of VZV, as well as the development of a skin- and neuro-attenuated live varicella vaccine comprising an ORF7-deficient mutant, v7D. This work could provide insights into the research of novel virus vaccines based on functional genomics and reverse genetics.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen University, Xiamen 361102, China; (W.W.); (D.P.)
| | - Dequan Pan
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen University, Xiamen 361102, China; (W.W.); (D.P.)
| | - Tong Cheng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen University, Xiamen 361102, China; (W.W.); (D.P.)
| | - Hua Zhu
- Department of Microbiology and Molecular Genetics, New Jersey Medical School, Rutgers University, Newark, NJ 070101, USA
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12
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Lim DK, Park CE. Relationship between the Thyroid Hormone and Viral Infections in Pregnancy. KOREAN JOURNAL OF CLINICAL LABORATORY SCIENCE 2022. [DOI: 10.15324/kjcls.2022.54.1.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Dong-Kyu Lim
- Department of Laboratory Medicine, CHA Bundang Women's Medical Center, Seongnam, Korea
- Department of Medical Laser, Dankook University Graduate School of Medicine, Cheonan, Korea
| | - Chang-Eun Park
- Department of Biomedical Laboratory Science, Molecular Diagnostics Research Institute, Namseoul University, Cheonan, Korea
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13
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Pawaskar M, Méroc E, Samant S, Flem E, Bencina G, Riera-Montes M, Heininger U. Economic burden of varicella in Europe in the absence of universal varicella vaccination. BMC Public Health 2021; 21:2312. [PMID: 34930179 PMCID: PMC8690977 DOI: 10.1186/s12889-021-12343-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 11/26/2021] [Indexed: 11/29/2022] Open
Abstract
Background Though the disease burden of varicella in Europe has been reported previously, the economic burden is still unknown. This study estimated the economic burden of varicella in Europe in the absence of Universal Varicella Vaccination (UVV) in 2018 Euros from both payer (direct costs) and societal (direct and indirect costs) perspectives. Methods We estimated the country specific and overall annual costs of varicella in absence of UVV in 31 European countries (27 EU countries, plus Iceland, Norway, Switzerland and the United Kingdom). To obtain country specific unit costs and associated healthcare utilization, we conducted a systematic literature review, searching in PubMed, EMBASE, NEED, DARE, REPEC, Open Grey, and public heath websites (1/1/1999–10/15/2019). The number of annual varicella cases, deaths, outpatient visits and hospitalizations were calculated (without UVV) based on age-specific incidence rates (Riera-Montes et al. 2017) and 2018 population data by country. Unit cost per varicella case and disease burden data were combined using stochastic modeling to estimate 2018 costs stratified by country, age and healthcare resource. Results Overall annual total costs associated with varicella were estimated to be €662,592,061 (Range: €309,552,363 to €1,015,631,760) in Europe in absence of UVV. Direct and indirect costs were estimated at €229,076,206 (Range €144,809,557 to €313,342,856) and €433,515,855 (Range €164,742,806 to €702,288,904), respectively. Total cost per case was €121.45 (direct: €41.99; indirect: €79.46). Almost half of the costs were attributed to cases in children under 5 years, owing mainly to caregiver work loss. The distribution of costs by healthcare resource was similar across countries. France and Germany accounted for 49.28% of total annual costs, most likely due to a combination of high numbers of cases and unit costs in these countries. Conclusions The economic burden of varicella across Europe in the absence of UVV is substantial (over 600 M€), primarily driven by caregiver burden including work productivity losses. Supplementary Information The online version contains supplementary material available at 10.1186/s12889-021-12343-x.
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Affiliation(s)
- Manjiri Pawaskar
- Merck & Co., Inc. Center for Observational and Real-World Evidence, 2000 Galloping Hill Road, Kenilworth, NJ, 07033, USA.
| | - Estelle Méroc
- P95 Epidemiology and Pharmacovigilance, Koning Leopold III laan 1, 3001, Leuven, Belgium
| | - Salome Samant
- Merck & Co., Inc. Center for Observational and Real-World Evidence, 2000 Galloping Hill Road, Kenilworth, NJ, 07033, USA
| | - Elmira Flem
- MSD (Norge) AS, Postboks 458 Brakerøya, 3002, Drammen, Norway
| | - Goran Bencina
- MSD, Calle de Josefa Valcárcel, 38, 28027, Madrid, Spain
| | - Margarita Riera-Montes
- P95 Epidemiology and Pharmacovigilance, Koning Leopold III laan 1, 3001, Leuven, Belgium
| | - Ulrich Heininger
- University of Basel Children's Hospital (UKBB), Spitalstrasse 33, 4056, Basel, Switzerland.,Faculty of Medicine, University of Basel, Klingelbergstrasse 61, 4056, Basel, Switzerland
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14
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Widgren K, Tomba GS, Leung KY, Giesecke J. Modelling varicella vaccination - What does a lack of surge in herpes zoster incidence tell us about exogenous boosting? Vaccine 2021; 40:673-681. [PMID: 34930603 DOI: 10.1016/j.vaccine.2021.11.063] [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: 06/12/2021] [Revised: 11/11/2021] [Accepted: 11/22/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND For decades, assessments of the impact of universal varicella vaccination on the epidemiology of varicella and herpes zoster (HZ) have been made using mathematical modelling. Decreased virus circulation and the resulting diminished exogenous boosting have been predicted to lead to a surge in HZ incidence. Lately, the exogenous boosting hypothesis has been challenged due to a lack of an extensive surge in HZ incidence in countries with, by now long-standing universal varicella vaccination. METHODS In a deterministic compartmental transmission model of varicella zoster virus disease, we model various levels and duration of protection from boosting to explore the impact of successful childhood varicella vaccination on HZ incidence. RESULTS Considering total HZ incidence, lifelong and strong protection from boosting give a stable incidence of HZ for about 60 years followed by a decline, whereas lifelong intermediate protection leads to a decline. So does weak protection of intermediate duration. Full and short protection, lead to a small surge, while full and intermediate protection lead to the largest HZ surge. HZ incidence by age group show that total incidence is the result of opposing increasing and decreasing trends in the various age groups over time. CONCLUSIONS The absence of an extensive surge in HZ incidence after varicella vaccination can, especially during the first 20-30 years, occur in either strong, intermediate or weak boosting scenarios. The impact seems to depend on an interplay of the protective level and duration of the protection in determining the basic reactivation rate and the proportion of the population that is susceptible at the start of vaccination. However, the picture depends on whether the entire population or specific age groups are observed.
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Affiliation(s)
- Katarina Widgren
- Department of Medicine, Huddinge, Karolinska Institute, Stockholm, Sweden; Department of Public Health Analysis and Data Management, The Public Health Agency of Sweden, Solna, Sweden.
| | | | - Ka Yin Leung
- Department of Mathematics, Stockholm University, Stockholm, Sweden
| | - Johan Giesecke
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
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15
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Akpo EIH, Cristeau O, Hunjan M, Casabona G. Epidemiological Impact and Cost-Effectiveness of Varicella Vaccination Strategies in the United Kingdom. Clin Infect Dis 2021; 73:e3617-e3626. [PMID: 33173938 PMCID: PMC8664478 DOI: 10.1093/cid/ciaa1708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Indexed: 12/14/2022] Open
Abstract
Background Despite the burden of varicella, there is no universal varicella vaccination (UVV) program in the United Kingdom (UK) due to concerns that it could increase herpes zoster (HZ) incidence. We assessed the cost-utility of a first-dose monovalent (varicella [V]) or quadrivalent (measles-mumps-rubella-varicella [MMRV]) followed by a second-dose MMRV UVV program. GSK and MSD varicella-containing vaccines (VCVs) were considered. Methods Dynamic transmission and cost-effectiveness models were adapted to the UK. Outcomes measured included varicella and HZ incidences and the incremental cost-utility ratio (ICURs) over a lifetime horizon. Payer and societal perspectives were evaluated. Results The impact of V-MMRV and MMRV-MMRV UVV programs on varicella incidence was comparable between both VCVs at equilibrium. HZ incidence increased by 1.6%–1.7% over 7 years after UVV start, regardless of the strategies, then decreased by >95% at equilibrium. ICURs ranged from £5665 (100 years) to £18 513 (20 years) per quality-adjusted life-year (QALY) gained with V-MMRV and from £9220 to £27 101 per QALY gained with MMRV-MMRV (payer perspective). MMRV-MMRV was cost-effective in the medium- and long-terms with GSK VCV and only cost-effective in the long term with MSD VCV at a £20 000 per QALY gained threshold. Without the exogenous boosting hypothesis, HZ incidence decreased through UVV implementation. ICURs were most sensitive to discount rates and MMRV price. Conclusions A 2-dose UVV was demonstrated to be a cost-effective alternative to no vaccination. With comparable effectiveness as MSD VCV at lower costs, GSK VCV may offer higher value for the money.
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16
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Di Pietrantonj C, Rivetti A, Marchione P, Debalini MG, Demicheli V. Vaccines for measles, mumps, rubella, and varicella in children. Cochrane Database Syst Rev 2021; 11:CD004407. [PMID: 34806766 PMCID: PMC8607336 DOI: 10.1002/14651858.cd004407.pub5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Measles, mumps, rubella, and varicella (chickenpox) are serious diseases that can lead to serious complications, disability, and death. However, public debate over the safety of the trivalent MMR vaccine and the resultant drop in vaccination coverage in several countries persists, despite its almost universal use and accepted effectiveness. This is an update of a review published in 2005 and updated in 2012. OBJECTIVES To assess the effectiveness, safety, and long- and short-term adverse effects associated with the trivalent vaccine, containing measles, rubella, mumps strains (MMR), or concurrent administration of MMR vaccine and varicella vaccine (MMR+V), or tetravalent vaccine containing measles, rubella, mumps, and varicella strains (MMRV), given to children aged up to 15 years. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library 2019, Issue 5), which includes the Cochrane Acute Respiratory Infections Group's Specialised Register, MEDLINE (1966 to 2 May 2019), Embase (1974 to 2 May 2019), the WHO International Clinical Trials Registry Platform (2 May 2019), and ClinicalTrials.gov (2 May 2019). SELECTION CRITERIA We included randomised controlled trials (RCTs), controlled clinical trials (CCTs), prospective and retrospective cohort studies (PCS/RCS), case-control studies (CCS), interrupted time-series (ITS) studies, case cross-over (CCO) studies, case-only ecological method (COEM) studies, self-controlled case series (SCCS) studies, person-time cohort (PTC) studies, and case-coverage design/screening methods (CCD/SM) studies, assessing any combined MMR or MMRV / MMR+V vaccine given in any dose, preparation or time schedule compared with no intervention or placebo, on healthy children up to 15 years of age. DATA COLLECTION AND ANALYSIS Two review authors independently extracted data and assessed the methodological quality of the included studies. We grouped studies for quantitative analysis according to study design, vaccine type (MMR, MMRV, MMR+V), virus strain, and study settings. Outcomes of interest were cases of measles, mumps, rubella, and varicella, and harms. Certainty of evidence of was rated using GRADE. MAIN RESULTS We included 138 studies (23,480,668 participants). Fifty-one studies (10,248,159 children) assessed vaccine effectiveness and 87 studies (13,232,509 children) assessed the association between vaccines and a variety of harms. We included 74 new studies to this 2019 version of the review. Effectiveness Vaccine effectiveness in preventing measles was 95% after one dose (relative risk (RR) 0.05, 95% CI 0.02 to 0.13; 7 cohort studies; 12,039 children; moderate certainty evidence) and 96% after two doses (RR 0.04, 95% CI 0.01 to 0.28; 5 cohort studies; 21,604 children; moderate certainty evidence). The effectiveness in preventing cases among household contacts or preventing transmission to others the children were in contact with after one dose was 81% (RR 0.19, 95% CI 0.04 to 0.89; 3 cohort studies; 151 children; low certainty evidence), after two doses 85% (RR 0.15, 95% CI 0.03 to 0.75; 3 cohort studies; 378 children; low certainty evidence), and after three doses was 96% (RR 0.04, 95% CI 0.01 to 0.23; 2 cohort studies; 151 children; low certainty evidence). The effectiveness (at least one dose) in preventing measles after exposure (post-exposure prophylaxis) was 74% (RR 0.26, 95% CI 0.14 to 0.50; 2 cohort studies; 283 children; low certainty evidence). The effectiveness of Jeryl Lynn containing MMR vaccine in preventing mumps was 72% after one dose (RR 0.24, 95% CI 0.08 to 0.76; 6 cohort studies; 9915 children; moderate certainty evidence), 86% after two doses (RR 0.12, 95% CI 0.04 to 0.35; 5 cohort studies; 7792 children; moderate certainty evidence). Effectiveness in preventing cases among household contacts was 74% (RR 0.26, 95% CI 0.13 to 0.49; 3 cohort studies; 1036 children; moderate certainty evidence). Vaccine effectiveness against rubella, using a vaccine with the BRD2 strain which is only used in China, is 89% (RR 0.11, 95% CI 0.03 to 0.42; 1 cohort study; 1621 children; moderate certainty evidence). Vaccine effectiveness against varicella (any severity) after two doses in children aged 11 to 22 months is 95% in a 10 years follow-up (rate ratio (rr) 0.05, 95% CI 0.03 to 0.08; 1 RCT; 2279 children; high certainty evidence). Safety There is evidence supporting an association between aseptic meningitis and MMR vaccines containing Urabe and Leningrad-Zagreb mumps strains, but no evidence supporting this association for MMR vaccines containing Jeryl Lynn mumps strains (rr 1.30, 95% CI 0.66 to 2.56; low certainty evidence). The analyses provide evidence supporting an association between MMR/MMR+V/MMRV vaccines (Jeryl Lynn strain) and febrile seizures. Febrile seizures normally occur in 2% to 4% of healthy children at least once before the age of 5. The attributable risk febrile seizures vaccine-induced is estimated to be from 1 per 1700 to 1 per 1150 administered doses. The analyses provide evidence supporting an association between MMR vaccination and idiopathic thrombocytopaenic purpura (ITP). However, the risk of ITP after vaccination is smaller than after natural infection with these viruses. Natural infection of ITP occur in 5 cases per 100,000 (1 case per 20,000) per year. The attributable risk is estimated about 1 case of ITP per 40,000 administered MMR doses. There is no evidence of an association between MMR immunisation and encephalitis or encephalopathy (rate ratio 0.90, 95% CI 0.50 to 1.61; 2 observational studies; 1,071,088 children; low certainty evidence), and autistic spectrum disorders (rate ratio 0.93, 95% CI 0.85 to 1.01; 2 observational studies; 1,194,764 children; moderate certainty). There is insufficient evidence to determine the association between MMR immunisation and inflammatory bowel disease (odds ratio 1.42, 95% CI 0.93 to 2.16; 3 observational studies; 409 cases and 1416 controls; moderate certainty evidence). Additionally, there is no evidence supporting an association between MMR immunisation and cognitive delay, type 1 diabetes, asthma, dermatitis/eczema, hay fever, leukaemia, multiple sclerosis, gait disturbance, and bacterial or viral infections. AUTHORS' CONCLUSIONS: Existing evidence on the safety and effectiveness of MMR/MMRV vaccines support their use for mass immunisation. Campaigns aimed at global eradication should assess epidemiological and socioeconomic situations of the countries as well as the capacity to achieve high vaccination coverage. More evidence is needed to assess whether the protective effect of MMR/MMRV could wane with time since immunisation.
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Affiliation(s)
- Carlo Di Pietrantonj
- Servizio Regionale di Riferimento per l'Epidemiologia, SSEpi-SeREMI, Azienda Sanitaria Locale ASL AL, Alessandria, Italy
| | - Alessandro Rivetti
- Dipartimento di Prevenzione - S.Pre.S.A.L, ASL CN2 Alba Bra, Alba, Italy
| | - Pasquale Marchione
- Signal Management Unit, Post-Marketing Surveillance Department, Italian Medicine Agency - AIFA, Rome, Italy
| | | | - Vittorio Demicheli
- Servizio Regionale di Riferimento per l'Epidemiologia, SSEpi-SeREMI, Azienda Sanitaria Locale ASL AL, Alessandria, Italy
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17
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Gershon AA, Gershon MD. Widespread use of varicella vaccine does not reduce immunity to zoster of others. J Infect Dis 2021; 225:361-363. [PMID: 34609507 PMCID: PMC8807174 DOI: 10.1093/infdis/jiab501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/17/2022] Open
Affiliation(s)
- Anne A Gershon
- Departments of Pediatrics and Pathology and Cell Biology, Columbia University, Vagelos College of P&S, New York, NY
| | - Michael D Gershon
- Departments of Pediatrics and Pathology and Cell Biology, Columbia University, Vagelos College of P&S, New York, NY
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18
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Carryn S, Cheuvart B, Povey M, Dagnew AF, Harpaz R, van der Most R, Casabona G. No consistent evidence of decreased exposure to varicella-zoster virus among older adults in countries with universal varicella vaccination. J Infect Dis 2021; 225:413-421. [PMID: 34609490 PMCID: PMC8807177 DOI: 10.1093/infdis/jiab500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/04/2021] [Indexed: 11/16/2022] Open
Abstract
Background Universal varicella vaccination might reduce opportunities for varicella-zoster virus (VZV) exposure and protective immunological boosting, thus increasing herpes zoster incidence in latently infected adults. We assessed humoral and cell-mediated immunity (CMI), as markers of VZV exposure, in adults aged ≥50 years. Methods We repurposed data from placebo recipients in a large multinational clinical trial (ZOE-50). Countries were clustered based on their varicella vaccination program characteristics, as having high, moderate, or low VZV circulation. Anti-VZV antibody geometric mean concentrations, median frequencies of VZV-specific CD4 T cells, and percentages of individuals with increases in VZV-specific CD4 T-cell frequencies were compared across countries and clusters. Sensitivity analyses using a variable number of time points and different thresholds were performed for CMI data. Results VZV-specific humoral immunity from 17 countries (12 high, 2 moderate, 3 low circulation) varied significantly between countries (P < .0001) but not by VZV circulation. No significant differences were identified in VZV-specific CMI between participants from 2 high versus 1 low circulation country. In 3/5 sensitivity analyses, increases in CMI were more frequent in high VZV circulation countries (.03 ≤ P < .05). Conclusions We found no consistent evidence of reduced VZV exposure among older adults in countries with universal varicella vaccination. Clinical Trials Registration NCT01165177.
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Affiliation(s)
| | | | | | - Alemnew F Dagnew
- GSK, 14200 Shady Grove Road, Rockville, MD, USA.,Bill & Melinda Gates Medical Research Institute, Cambridge, MA, USA
| | | | - Robbert van der Most
- GSK, Rue de l'Institut, Rixensart, Belgium.,Coalition for Epidemic Preparedness Innovations (CEPI), 0473 Oslo, Norway
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19
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Abstract
Michiaki Takahashi developed the live attenuated varicella vaccine in 1974 . This was the first, and is still the only, herpesvirus vaccine. Early studies showed promise, but the vaccine was rigorously tested on immunosuppressed patients because of their high risk of fatal varicella; vaccination proved to be lifesaving. Subsequently, the vaccine was found to be safe and effective in healthy children. Eventually, varicella vaccine became a component of measles mumps rubella vaccine, 2 doses of which are administered in the USA to ~90% of children. The incidence of varicella has dropped dramatically in the USA since vaccine-licensure in 1995. Varicella vaccine is also associated with a decreased incidence of zoster and is protective for susceptible adults. Today, immunocompromised individuals are protected against varicella due to vaccine-induced herd immunity. Latent infection with varicella zoster virus occurs after vaccination; however, the vaccine strain is impaired for its ability to reactivate.
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Affiliation(s)
- Anne A Gershon
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York, USA
| | - Michael D Gershon
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York, USA
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20
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Harpaz R. The Effectiveness of Recombinant Zoster Vaccine: Observations in the Wild. Clin Infect Dis 2021; 73:957-960. [PMID: 33580235 DOI: 10.1093/cid/ciab130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Rafael Harpaz
- Harpaz Herman Consultants, LLC, US Public Health Service (USPHS), Atlanta, Georgia, USA
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21
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Goldman GS. Insights on the Impact of External and Internal Boosting on Varicella-Zoster Virus Reactivation Based on Evidence From the First Decade of the United States Universal Varicella Vaccination Program. Cureus 2021; 13:e16963. [PMID: 34373828 PMCID: PMC8346608 DOI: 10.7759/cureus.16963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2021] [Indexed: 11/05/2022] Open
Abstract
Since the licensure of the varicella vaccine in the United States in 1995 and the implementation of the universal varicella vaccination program, varicella infection rates, and associated morbidity and mortality rates have decreased. However, controversy exists over whether universal vaccination has resulted in an increased incidence of herpes zoster (HZ). In 1965, Dr. Hope-Simpson hypothesized that exogenous exposures to the wild-type varicella-zoster virus (wt-VZV) provide immune boosts that inhibit HZ; therefore, reducing the amount of circulating wt-VZV may have the negative effect of increasing the incidence of HZ. A historical review of data from the Centers for Disease Control and Prevention-sponsored Antelope Valley Varicella Active Surveillance Project, along with other studies, is provided to investigate the exogenous boosting hypothesis in the first decade post-vaccine licensure. These data indicated that adoption of universal varicella vaccination led to (1) significant HZ incidence rate increases among children, adolescents, and adults with a history of wild-type varicella and (2) decline in varicella vaccine efficacy after the initial post-licensure period. These effects were likely due to reduced exogenous exposures from children shedding wt-VZV. Appropriate methodologies for ongoing research are also discussed, both in studies during the first decade post-licensure and more recent work.
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Affiliation(s)
- Gary S Goldman
- Research, Independent Computer Scientist, Bogue Chitto, USA
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22
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Rafferty E, Reifferscheid L, Russell ML, Booth S, Svenson LW, MacDonald SE. The impact of varicella vaccination on paediatric herpes zoster epidemiology: a Canadian population-based retrospective cohort study. Eur J Clin Microbiol Infect Dis 2021; 40:2363-2370. [PMID: 34175998 PMCID: PMC8520524 DOI: 10.1007/s10096-021-04298-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/17/2021] [Indexed: 11/24/2022]
Abstract
The impact of universal varicella vaccination on herpes zoster (HZ) risk in unvaccinated and vaccinated children, and its long-term influence on HZ epidemiology, remains unknown. We conducted a retrospective cohort study using population-based administrative health data for children born between 1993 and 2018 (n = 924,124). We calculated age-specific cumulative HZ incidence rates by vaccination status for cohorts born before (1993–1999) and after (2000–2018) programme implementation; results were used to calculate relative risk of HZ by age group, vaccination status and vaccine availability period. Annual HZ incidence rates were calculated for 1993–2018. HZ risk was higher among unvaccinated children compared to vaccinated children across age groups; 64% higher before universal vaccination (RR: 0.36, 95% CI: 0.33, 0.39), and 32% higher after universal vaccination (RR: 0.68, 95% CI: 0.64, 0.73). Among unvaccinated children, HZ risk was 60% lower after vaccine programme implementation (RR: 0.40, 95% CI: 0.38, 0.43). Two-dose receipt corresponded with a 41% lower risk of HZ compared to one-dose receipt (RR: 0.59, 95% CI: 0.53, 0.65). Crude annual HZ incidence rates declined 64% after programme implementation, with decreases observed across age groups. Universal varicella vaccination programme implementation corresponds to decreased paediatric HZ incidence across age groups, in both vaccinated and unvaccinated individuals. Results from this study can be used to help inform varicella vaccination programme decision-making in other countries.
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Affiliation(s)
- Ellen Rafferty
- Institute of Health Economics, Edmonton, Alberta, Canada. .,Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada.
| | | | - Margaret L Russell
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Stephanie Booth
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Lawrence W Svenson
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Analytics & Performance Reporting Branch, Alberta Health, Government of Alberta, Edmonton, Alberta, Canada.,Division of Preventive Medicine, University of Alberta, Edmonton, Alberta, Canada.,School of Public Health, University of Alberta, Edmonton, Alberta, Canada
| | - Shannon E MacDonald
- Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada.,School of Public Health, University of Alberta, Edmonton, Alberta, Canada
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23
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Rutstein BH, Gmuca S, Gerber JS, Lim T, Argraves M, Ogdie A. Validation of coding algorithms for the identification of herpes zoster among children. Pharmacoepidemiol Drug Saf 2021; 30:1162-1167. [PMID: 33960541 DOI: 10.1002/pds.5264] [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: 03/03/2021] [Revised: 04/28/2021] [Accepted: 05/03/2021] [Indexed: 11/08/2022]
Abstract
PURPOSE To examine the validity of International Classification of Diseases, 10th Revision, (ICD-10) code-based algorithms for herpes zoster (HZ) in the electronic medical record (EMR) of a large, integrated pediatric healthcare network and to examine baseline demographics and chronic comorbidities associated with HZ in a representative pediatric population. METHODS We reviewed the electronic charts of all patients with a single ICD-10 for HZ (B02.xx) as their primary or secondary diagnosis in the EMR of the Children's Hospital of Philadelphia (CHOP) healthcare network from January 2010-March 2019. The positive predictive value (PPV) for a single code for HZ was calculated and alternative algorithms were examined to determine which method resulted in the highest PPV. RESULTS The PPV for a single ICD-10 code was 91.7% (95% CI 80.8-95.4) for definitive and/or probable cases of HZ and 63.9% (95% CI 53.4%-75.5%) for definitive cases alone. Adding a prescription for an antiviral did not improve the PPV. However, adding a new code for rash entered within 1 week of the HZ code increased the PPV to 100% for definitive and/or probable cases but with substantial loss of sensitivity. A high proportion of children with HZ who required inpatient hospitalization had chronic disease (70%) and were on systemic immunomodulatory therapy (50%). CONCLUSIONS HZ can be identified with a high PPV in electronic medical records of children using ICD-10 code alone. These findings lay the foundation for future pharmacoepidemiologic research to better understand risk factors for HZ infection.
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Affiliation(s)
- Beth H Rutstein
- Department of Pediatrics, Division of Rheumatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sabrina Gmuca
- Department of Pediatrics, Division of Rheumatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA.,PolicyLab, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Jeffrey S Gerber
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, Division of Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Tristan Lim
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Melissa Argraves
- Department of Pediatrics, Division of Rheumatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Alexis Ogdie
- Department of Medicine, Division of Rheumatology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
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24
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Wolff E, Widgren K, Scalia Tomba G, Roth A, Lep T, Andersson S. Cost-effectiveness of varicella and herpes zoster vaccination in Sweden: An economic evaluation using a dynamic transmission model. PLoS One 2021; 16:e0251644. [PMID: 33984060 PMCID: PMC8118323 DOI: 10.1371/journal.pone.0251644] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 04/29/2021] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES Comprehensive cost-effectiveness analyses of introducing varicella and/or herpes zoster vaccination in the Swedish national vaccination programme. DESIGN Cost-effectiveness analyses based on epidemiological results from a specifically developed transmission model. SETTING National vaccination programme in Sweden, over an 85- or 20-year time horizon depending on the vaccination strategy. PARTICIPANTS Hypothetical cohorts of people aged 12 months and 65-years at baseline. INTERVENTIONS Four alternative vaccination strategies; 1, not to vaccinate; 2, varicella vaccination with one dose of the live attenuated vaccine at age 12 months and a second dose at age 18 months; 3, herpes zoster vaccination with one dose of the live attenuated vaccine at 65 years of age; and 4, both vaccine against varicella and herpes zoster with the before-mentioned strategies. MAIN OUTCOME MEASURES Accumulated cost and quality-adjusted life years (QALY) for each strategy, and incremental cost-effectiveness ratios (ICER). RESULTS It would be cost-effective to vaccinate against varicella (dominant), but not to vaccinate against herpes zoster (ICER of EUR 200,000), assuming a cost-effectiveness threshold of EUR 50,000 per QALY. The incremental analysis between varicella vaccination only and the combined programme results in a cost per gained QALY of almost EUR 1.6 million. CONCLUSIONS The results from this study are central components for policy-relevant decision-making, and suggest that it was cost-effective to introduce varicella vaccination in Sweden, whereas herpes zoster vaccination with the live attenuated vaccine for the elderly was not cost-effective-the health effects of the latter vaccination cannot be considered reasonable in relation to its costs. Future observational and surveillance studies are needed to make reasonable predictions on how boosting affects the herpes zoster incidence in the population, and thus the cost-effectiveness of a vaccination programme against varicella. Also, the link between herpes zoster and sequelae need to be studied in more detail to include it suitably in health economic evaluations.
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Affiliation(s)
- Ellen Wolff
- Department of Public Health Analysis and Data Management, Public Health Agency of Sweden, Solna, Sweden
- School of Public Health and Community Medicine, Institute of Medicine, University of Gothenburg, Göteborg, Sweden
- * E-mail:
| | - Katarina Widgren
- Department of Public Health Analysis and Data Management, Public Health Agency of Sweden, Solna, Sweden
- Department of Medicine, Huddinge C2:94, Karolinska University Hospital, Stockholm, Sweden
| | | | - Adam Roth
- Institution for Translational Medicine, Lund University, Malmö, Sweden
| | - Tiia Lep
- Department of Public Health Analysis and Data Management, Public Health Agency of Sweden, Solna, Sweden
| | - Sören Andersson
- Department of Public Health Analysis and Data Management, Public Health Agency of Sweden, Solna, Sweden
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Suh J, Lee T, Choi JK, Lee J, Park SH. The impact of two-dose varicella vaccination on varicella and herpes zoster incidence in South Korea using a mathematical model with changing population demographics. Vaccine 2021; 39:2575-2583. [PMID: 33814230 DOI: 10.1016/j.vaccine.2021.03.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/13/2021] [Accepted: 03/16/2021] [Indexed: 01/29/2023]
Abstract
BACKGROUND In South Korea, one-dose varicella vaccination was introduced to the National Immunization Program in 2005, but varicella outbreaks have continued to occur. Therefore, a two-dose vaccination strategy is considered. METHODS We developed an age-structured deterministic compartment model using Korean population projection data. The impact of adding a second dose of varicella vaccine on varicella and herpes zoster (HZ) epidemiology was assessed under four different vaccine effectiveness (VE) scenarios (base, moderate, lowest, highest) and the optimal timing of the second vaccine dose (18 months, 4, 5, or 6 years of age) was examined over the period 2020-2065. RESULTS A two-dose vaccination schedule reduced the cumulative varicella incidence by > 90% compared to no vaccination, regardless of the VE. The additional reduction attributable to a second dose compared to a single dose was greatest (82%) with the lowest VE scenario. A second dose at 6 years of age reduced the varicella incidence at a population level, whereas a second dose at 18 months of age reduced the varicella incidence primarily in the target birth cohorts. Routine vaccination at the age of 18 months with a catch-up vaccination of 6-year-olds was the optimal strategy for birth cohort and population-level control. HZ incidence continued to increase under no vaccination scenario, which represents the effect of aging population. Under a two-dose scenario, the additional increase in HZ incidence attributable to the reduced exogenous boosting was small relative to a one-dose scenario and a further reduction in HZ cases was observed. CONCLUSION A two-dose varicella vaccination schedule would significantly reduce varicella and HZ incidence in the long term. A second dose at the age of 18 months with a catch-up vaccination of 6-year-olds would be optimal for controlling varicella in South Korea.
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Affiliation(s)
- Jiyeon Suh
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, Republic of Korea
| | - Taeyong Lee
- School of Mathematics and Computing (Mathematics), Yonsei University, Seoul, Republic of Korea
| | - Jae-Ki Choi
- Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jeehyun Lee
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, Republic of Korea; School of Mathematics and Computing (Mathematics), Yonsei University, Seoul, Republic of Korea.
| | - Sun Hee Park
- Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Harpaz R. How Little We Know Herpes Zoster. J Infect Dis 2021; 222:708-711. [PMID: 31830261 DOI: 10.1093/infdis/jiz653] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 12/10/2019] [Indexed: 12/28/2022] Open
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Modelling a cost-effective vaccination strategy for the prevention of varicella and herpes zoster infection: A systematic review. Vaccine 2021; 39:1370-1382. [PMID: 33551300 DOI: 10.1016/j.vaccine.2021.01.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Varicella zoster virus (VZV) and its re-emergence as herpes zoster (HZ) is associated with significant morbidity and mortality. While studies show that VZV vaccination is effective in reducing VZV incidence, many decision makers have not added VZV to their vaccination schedule, largely due to uncertainty surrounding the effect of VZV vaccination on HZ incidence (exogenous boosting, EB), and the cost-effectiveness (CE) of vaccination. METHODS A systematic review was conducted to identify the current published evidence of CE of VZV vaccination strategies where both VZV and HZ incidence were modelled. RESULTS Six studies (one published in 2003 and five between 2010 and 2019), were identified with all conducting cost-utility analysis using a dynamic transmission modelling approach and assuming EB. All predicted that mass infant VZV vaccination would rapidly reduce VZV incidence, but HZ incidence would increase. Compared with no-vaccination, the CE of VZV vaccination strategies ranged from higher costs and poorer outcomes (dominated), towards CE (incremental cost-effectiveness ratios of between $7,000 to $61,000 USD), or lower cost and better outcomes (dominant). However, without EB, HZ incidence immediately dropped below pre-vaccination levels making VZV vaccination quickly CE and/or dominant to a no vaccination strategy. CONCLUSIONS Current models are sensitive to assumptions of EB suggesting that future studies consider an agent-based modelling approach to address the individual nature of variables that determine the infectiousness of VZV.
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Álvarez García FJ, Cilleruelo Ortega MJ, Álvarez Aldeán J, Garcés-Sánchez M, García Sánchez N, Garrote Llanos E, Hernández Merino Á, Iofrío de Arce A, Montesdeoca Melián A, Navarro Gómez ML, Ruiz-Contreras J. [Immunisation schedule of the Pediatric Spanish Association: 2021 recommendations]. An Pediatr (Barc) 2021; 94:53.e1-53.e10. [PMID: 33419517 DOI: 10.1016/j.anpedi.2020.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 10/03/2020] [Indexed: 10/22/2022] Open
Abstract
The CAV-AEP annually publishes the immunisation schedule considered optimal for all children and adolescent resident in Spain, taking into account the available evidence. The 2+1 schedule is recommended (2, 4, and 11 months) with hexavalent vaccines (DTPa-VPI-Hib-HB) and with 13-valent pneumococcal conjugate.A 6-year booster is recommended, preferably with DTPa (if available), with a dose of polio for those who received 2+1 schemes, as well as vaccination with Tdpa in adolescents and in each pregnancy, preferably between 27 and 32 weeks. Rotavirus vaccine should be systematic for all infants. Meningococcal B vaccine, with a 2+1 schedule, should be included in routine calendar. In addition to the inclusion of the conjugated tetravalent meningococcal vaccine (MenACWY) at 12 years of age with catch up to 18 years, inclusive, the CAV recommends this vaccine to be also included at 12 months of age, replacing MenC. Likewise, it is recommended in those over 6 weeks of age with risk factors or who travel to countries with a high incidence of these serogroups. Two-dose schedules for triple viral (12 months and 3-4 years) and varicella (15 months and 3-4 years) will be used. The second dose could be applied as a tetraviral vaccine. Universal systematic vaccination against HPV is recommended, regardless of gender, preferably at 12 years, and greater effort should be made to improve coverage. The 9 genotype extends coverage for both genders.
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Affiliation(s)
| | - María José Cilleruelo Ortega
- Servicio de Pediatría, Hospital Universitario Puerta de Hierro-Majadahonda, Madrid, España; Departamento de Pediatría, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, España
| | | | - María Garcés-Sánchez
- Centro de Salud Nazaret, Valencia, España; Área de Vacunas, FISABIO, Valencia, España
| | - Nuria García Sánchez
- Centro de Salud Delicias Sur, Zaragoza, España; Departamento de Pediatría, Facultad de Medicina, Universidad de Zaragoza, Zaragoza, España
| | - Elisa Garrote Llanos
- Sección de Infectología, Hospital Universitario Basurto, Bilbao, España; Facultad de Medicina, Universidad del País Vasco, UPV-EHU, Bilbao, España
| | | | | | | | - María Luisa Navarro Gómez
- Servicio de Pediatría, Hospital Universitario Gregorio Marañón, Madrid, España; Departamento de Pediatría, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, España
| | - Jesús Ruiz-Contreras
- Servicio de Pediatría, Hospital Universitario 12 de Octubre, Madrid, España; Departamento de Pediatría, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, España
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Immunisation schedule of the Pediatric Spanish Association: 2021 recommendations. ANALES DE PEDIATRÍA (ENGLISH EDITION) 2021. [DOI: 10.1016/j.anpede.2020.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kauffmann F, Bechini A, Bonanni P, Casabona G, Wutzler P. Varicella vaccination in Italy and Germany – different routes to success: a systematic review. Expert Rev Vaccines 2020; 19:843-869. [DOI: 10.1080/14760584.2020.1825947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Angela Bechini
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Paolo Bonanni
- Department of Health Sciences, University of Florence, Florence, Italy
| | | | - Peter Wutzler
- Section of Experimental Virology, Institute of Medical Microbiology, University-Hospital Jena, Germany
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Doll MK, DeCoster B. Vaccine-Associated Shingles: What Do We Owe Varicella Vaccine Recipients in Adulthood? THE AMERICAN JOURNAL OF BIOETHICS : AJOB 2020; 20:78-80. [PMID: 32880521 DOI: 10.1080/15265161.2020.1795531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
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Harpaz R. Teach your parents well: Pediatric recipients of varicella vaccines yield insights for adults regarding herpes zoster. Vaccine 2020; 38:5877-5879. [DOI: 10.1016/j.vaccine.2020.07.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 11/28/2022]
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Di Pietrantonj C, Rivetti A, Marchione P, Debalini MG, Demicheli V. Vaccines for measles, mumps, rubella, and varicella in children. Cochrane Database Syst Rev 2020; 4:CD004407. [PMID: 32309885 PMCID: PMC7169657 DOI: 10.1002/14651858.cd004407.pub4] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Measles, mumps, rubella, and varicella (chickenpox) are serious diseases that can lead to serious complications, disability, and death. However, public debate over the safety of the trivalent MMR vaccine and the resultant drop in vaccination coverage in several countries persists, despite its almost universal use and accepted effectiveness. This is an update of a review published in 2005 and updated in 2012. OBJECTIVES To assess the effectiveness, safety, and long- and short-term adverse effects associated with the trivalent vaccine, containing measles, rubella, mumps strains (MMR), or concurrent administration of MMR vaccine and varicella vaccine (MMR+V), or tetravalent vaccine containing measles, rubella, mumps, and varicella strains (MMRV), given to children aged up to 15 years. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library 2019, Issue 5), which includes the Cochrane Acute Respiratory Infections Group's Specialised Register, MEDLINE (1966 to 2 May 2019), Embase (1974 to 2 May 2019), the WHO International Clinical Trials Registry Platform (2 May 2019), and ClinicalTrials.gov (2 May 2019). SELECTION CRITERIA We included randomised controlled trials (RCTs), controlled clinical trials (CCTs), prospective and retrospective cohort studies (PCS/RCS), case-control studies (CCS), interrupted time-series (ITS) studies, case cross-over (CCO) studies, case-only ecological method (COEM) studies, self-controlled case series (SCCS) studies, person-time cohort (PTC) studies, and case-coverage design/screening methods (CCD/SM) studies, assessing any combined MMR or MMRV / MMR+V vaccine given in any dose, preparation or time schedule compared with no intervention or placebo, on healthy children up to 15 years of age. DATA COLLECTION AND ANALYSIS Two review authors independently extracted data and assessed the methodological quality of the included studies. We grouped studies for quantitative analysis according to study design, vaccine type (MMR, MMRV, MMR+V), virus strain, and study settings. Outcomes of interest were cases of measles, mumps, rubella, and varicella, and harms. Certainty of evidence of was rated using GRADE. MAIN RESULTS We included 138 studies (23,480,668 participants). Fifty-one studies (10,248,159 children) assessed vaccine effectiveness and 87 studies (13,232,509 children) assessed the association between vaccines and a variety of harms. We included 74 new studies to this 2019 version of the review. Effectiveness Vaccine effectiveness in preventing measles was 95% after one dose (relative risk (RR) 0.05, 95% CI 0.02 to 0.13; 7 cohort studies; 12,039 children; moderate certainty evidence) and 96% after two doses (RR 0.04, 95% CI 0.01 to 0.28; 5 cohort studies; 21,604 children; moderate certainty evidence). The effectiveness in preventing cases among household contacts or preventing transmission to others the children were in contact with after one dose was 81% (RR 0.19, 95% CI 0.04 to 0.89; 3 cohort studies; 151 children; low certainty evidence), after two doses 85% (RR 0.15, 95% CI 0.03 to 0.75; 3 cohort studies; 378 children; low certainty evidence), and after three doses was 96% (RR 0.04, 95% CI 0.01 to 0.23; 2 cohort studies; 151 children; low certainty evidence). The effectiveness (at least one dose) in preventing measles after exposure (post-exposure prophylaxis) was 74% (RR 0.26, 95% CI 0.14 to 0.50; 2 cohort studies; 283 children; low certainty evidence). The effectiveness of Jeryl Lynn containing MMR vaccine in preventing mumps was 72% after one dose (RR 0.24, 95% CI 0.08 to 0.76; 6 cohort studies; 9915 children; moderate certainty evidence), 86% after two doses (RR 0.12, 95% CI 0.04 to 0.35; 5 cohort studies; 7792 children; moderate certainty evidence). Effectiveness in preventing cases among household contacts was 74% (RR 0.26, 95% CI 0.13 to 0.49; 3 cohort studies; 1036 children; moderate certainty evidence). Vaccine effectiveness against rubella is 89% (RR 0.11, 95% CI 0.03 to 0.42; 1 cohort study; 1621 children; moderate certainty evidence). Vaccine effectiveness against varicella (any severity) after two doses in children aged 11 to 22 months is 95% in a 10 years follow-up (rate ratio (rr) 0.05, 95% CI 0.03 to 0.08; 1 RCT; 2279 children; high certainty evidence). Safety There is evidence supporting an association between aseptic meningitis and MMR vaccines containing Urabe and Leningrad-Zagreb mumps strains, but no evidence supporting this association for MMR vaccines containing Jeryl Lynn mumps strains (rr 1.30, 95% CI 0.66 to 2.56; low certainty evidence). The analyses provide evidence supporting an association between MMR/MMR+V/MMRV vaccines (Jeryl Lynn strain) and febrile seizures. Febrile seizures normally occur in 2% to 4% of healthy children at least once before the age of 5. The attributable risk febrile seizures vaccine-induced is estimated to be from 1 per 1700 to 1 per 1150 administered doses. The analyses provide evidence supporting an association between MMR vaccination and idiopathic thrombocytopaenic purpura (ITP). However, the risk of ITP after vaccination is smaller than after natural infection with these viruses. Natural infection of ITP occur in 5 cases per 100,000 (1 case per 20,000) per year. The attributable risk is estimated about 1 case of ITP per 40,000 administered MMR doses. There is no evidence of an association between MMR immunisation and encephalitis or encephalopathy (rate ratio 0.90, 95% CI 0.50 to 1.61; 2 observational studies; 1,071,088 children; low certainty evidence), and autistic spectrum disorders (rate ratio 0.93, 95% CI 0.85 to 1.01; 2 observational studies; 1,194,764 children; moderate certainty). There is insufficient evidence to determine the association between MMR immunisation and inflammatory bowel disease (odds ratio 1.42, 95% CI 0.93 to 2.16; 3 observational studies; 409 cases and 1416 controls; moderate certainty evidence). Additionally, there is no evidence supporting an association between MMR immunisation and cognitive delay, type 1 diabetes, asthma, dermatitis/eczema, hay fever, leukaemia, multiple sclerosis, gait disturbance, and bacterial or viral infections. AUTHORS' CONCLUSIONS Existing evidence on the safety and effectiveness of MMR/MMRV vaccines support their use for mass immunisation. Campaigns aimed at global eradication should assess epidemiological and socioeconomic situations of the countries as well as the capacity to achieve high vaccination coverage. More evidence is needed to assess whether the protective effect of MMR/MMRV could wane with time since immunisation.
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Affiliation(s)
- Carlo Di Pietrantonj
- Azienda Sanitaria Locale ASL AL, Servizio Regionale di Riferimento per l'Epidemiologia, SSEpi-SeREMI, Via Venezia 6, Alessandria, Italy, 15121
| | - Alessandro Rivetti
- ASL CN2 Alba Bra, Dipartimento di Prevenzione - S.Pre.S.A.L, Via Vida 10, Alba, Piemonte, Italy, 12051
| | - Pasquale Marchione
- Italian Medicine Agency - AIFA, Signal Management Unit, Post-Marketing Surveillance Department, Via del Tritone 181, Rome, Italy, 00187
| | | | - Vittorio Demicheli
- Azienda Sanitaria Locale ASL AL, Servizio Regionale di Riferimento per l'Epidemiologia, SSEpi-SeREMI, Via Venezia 6, Alessandria, Italy, 15121
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Vos RA, Mollema L, van Boven M, van Lier A, Smits G, Janga-Jansen AVA, Baboe-Kalpoe S, Hulshof K, Stienstra Y, van der Klis FRM, de Melker HE. High varicella zoster virus susceptibility in Caribbean island populations: Implications for vaccination. Int J Infect Dis 2020; 94:16-24. [PMID: 32112964 DOI: 10.1016/j.ijid.2020.02.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/20/2020] [Accepted: 02/20/2020] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVES Varicella zoster virus (VZV) infection is reported regularly among adolescents and adults in Caribbean island populations. The disease more often runs a severe course among these populations, causing a substantial burden. The aim of this sero-epidemiological study was to obtain an insight into VZV susceptibility and its determinants in island populations of the Caribbean Netherlands (CN). METHODS Participants from Bonaire, St. Eustatius, and Saba (n = 1829, aged 0-90 years) donated a blood sample and completed a questionnaire. VZV-specific IgG antibodies were determined using a bead-based multiplex immunoassay. Risk factors were analysed using a logistic regression model. RESULTS Overall seroprevalence in CN was 78%, being lowest on St. Eustatius (73%) and highest on Bonaire and Saba (79%). Seropositivity increased gradually with age, with 60% and 80% at ages 10 years and 30 years, respectively, and ranging between 80% and 90% thereafter. Higher odds for VZV seronegativity were seen among persons who were born in CN or had resided there since early childhood, and among single-person households. CONCLUSIONS VZV susceptibility is relatively high among adolescents and adults in CN. In order to reduce the burden of VZV-related disease in these populations, routine varicella vaccination is recommended. As data are scarce, the study findings can serve as a blueprint for the epidemiology in tropical regions.
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Affiliation(s)
- Regnerus A Vos
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands; Department of Internal Medicine/Infectious Diseases, University Medical Centre/University of Groningen, Groningen, The Netherlands.
| | - Liesbeth Mollema
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
| | - Michiel van Boven
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
| | - Alies van Lier
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
| | - Gaby Smits
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
| | - Alcira V A Janga-Jansen
- Department of Public Health, Public Entity Bonaire, Kaya Neerlandia 41, Kralendijk, Bonaire, Caribbean Netherlands, The Netherlands.
| | - Sharda Baboe-Kalpoe
- Department of Public Health, Public Entity St. Eustatius, Cottageroad z/n, Oranjestad, St. Eustatius, Caribbean Netherlands, The Netherlands.
| | - Koen Hulshof
- Department of Public Health, Public Entity Saba, The Bottom, Saba, Caribbean Netherlands, The Netherlands.
| | - Ymkje Stienstra
- Department of Internal Medicine/Infectious Diseases, University Medical Centre/University of Groningen, Groningen, The Netherlands.
| | - Fiona R M van der Klis
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
| | - Hester E de Melker
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 MA Bilthoven, The Netherlands.
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Jayasinghe S, Sheridan S, Macartney K. Herpes zoster vaccination in Australia: what's available and who benefits? Aust Prescr 2020; 43:2-6. [PMID: 32139955 PMCID: PMC7026919 DOI: 10.18773/austprescr.2020.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Acute herpes zoster and associated postherpetic neuralgia is caused by reactivation of latent varicella zoster virus. It can be debilitating for older adults and interfere with activities of daily living A live, attenuated single-dose vaccine, that protects against both acute herpes zoster and postherpetic neuralgia, is available for free to all Australians aged 70 years, and in a catch-up program for those aged 71–79 years The vaccine is contraindicated in people who are immunocompromised, but can be considered in those who are receiving low doses of selected disease-modifying antirheumatic drugs Records of the Australian Immunisation Register suggest that only a third of 70 year olds received the vaccine in the first year-and-a-half of the program. This is likely an underestimation, but emphasises the importance of ensuring the vaccine is offered to all eligible patients and that vaccination is recorded on the Register A non-live recombinant herpes zoster vaccine has recently been developed which is more efficacious than the live vaccine in clinical trials. It is registered in Australia but not currently available
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Affiliation(s)
- Sanjay Jayasinghe
- National Centre for Immunisation Research and Surveillance, Kids Research, The Children's Hospital at Westmead, Sydney.,Discipline of Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney.,School of Public Health and Community Medicine, UNSW Medicine, University of New South Wales, Sydney
| | - Sarah Sheridan
- National Centre for Immunisation Research and Surveillance, Kids Research, The Children's Hospital at Westmead, Sydney.,Discipline of Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney.,School of Public Health and Community Medicine, UNSW Medicine, University of New South Wales, Sydney
| | - Kristine Macartney
- National Centre for Immunisation Research and Surveillance, Kids Research, The Children's Hospital at Westmead, Sydney.,Discipline of Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney.,School of Public Health and Community Medicine, UNSW Medicine, University of New South Wales, Sydney
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Rosamilia LL. Herpes Zoster Presentation, Management, and Prevention: A Modern Case-Based Review. Am J Clin Dermatol 2020; 21:97-107. [PMID: 31741185 DOI: 10.1007/s40257-019-00483-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Herpes zoster (HZ) is a common cutaneous entity with protean clinical presentations, management options, complication rates, and prevention strategies, all of which are rife with dogma. During an inpatient consultation for HZ, have you ever been approached by a frantic staff or family member, worried that a pregnant, elderly, or infant contact will be 'infected' if they get too close? Have your patients ever asked you about their risk of having HZ twice, or claimed that they have frequent 'recurrences'? In what timeline should antiviral therapy be employed? Is there evidence for prednisone or gabapentin in acute HZ treatment? Who should be vaccinated against HZ and what are the benefits and risks? In case-based form, these and other complex but common scenarios will be examined using clinical and viral mechanistic clues, along with updated treatment and prevention guidelines, to provide a modern HZ case management compendium, comprehensive of the diverse age and health populations now presenting with this condition.
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IMMUNISATION SCHEDULE OF THE SPANISH ASSOCIATION OF PAEDIATRICS: 2020 RECOMMENDATIONS. ANALES DE PEDIATRÍA (ENGLISH EDITION) 2020. [DOI: 10.1016/j.anpede.2019.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Álvarez García FJ, Cilleruelo Ortega MJ, Álvarez Aldeán J, Garcés-Sánchez M, García Sánchez N, Garrote Llanos E, Hernández Merino Á, Iofrío de Arce A, Merino Moína M, Montesdeoca Melián A, Navarro Gómez ML, Ruiz-Contreras J, Álvarez García FJ, Cilleruelo Ortega MJ, Álvarez Aldeán J, Garcés-Sánchez M, García Sánchez N, Garrote Llanos E, Hernández Merino Á, Iofrío de Arce A, Merino Moína M, Montesdeoca Melián A, Navarro Gómez ML, Ruiz-Contreras J. Calendario de vacunaciones de la Asociación Española de Pediatría: recomendaciones 2020. An Pediatr (Barc) 2020; 92:52.e1-52.e10. [DOI: 10.1016/j.anpedi.2019.10.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/22/2019] [Accepted: 10/26/2019] [Indexed: 12/19/2022] Open
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