Real-world effectiveness of COVID-19 vaccines: a literature review and meta-analysis

•This study reports COVID-19 vaccine effectiveness (VE) in real-world settings.•COVID-19 VE for fully and partially vaccinated individuals.•COVID-19 VE for healthcare workers, the elderly, and adults.•The effectiveness of different COVID-19 vaccine brands. To estimate the coronavirus disease 2019 (C...

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Published inInternational journal of infectious diseases Vol. 114; pp. 252 - 260
Main Authors Zheng, Caifang, Shao, Weihao, Chen, Xiaorui, Zhang, Bowen, Wang, Gaili, Zhang, Weidong
Format Journal Article
LanguageEnglish
Published Canada Elsevier Ltd 01.01.2022
Zhengzhou University. Published by Elsevier Ltd on behalf of International Society for Infectious Diseases
Elsevier
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Abstract •This study reports COVID-19 vaccine effectiveness (VE) in real-world settings.•COVID-19 VE for fully and partially vaccinated individuals.•COVID-19 VE for healthcare workers, the elderly, and adults.•The effectiveness of different COVID-19 vaccine brands. To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Studies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed. A total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6–92.6%), 97.2% (95% CI 96.1–98.3%), 97.4% (95% CI 96.0–98.8%), and 99.0% (95% CI 98.5–99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8–94.4%), 83.8% (95% CI 77.1–90.6%), and 95.3% (95% CI 92.0–98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%. The COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.
AbstractList •This study reports COVID-19 vaccine effectiveness (VE) in real-world settings.•COVID-19 VE for fully and partially vaccinated individuals.•COVID-19 VE for healthcare workers, the elderly, and adults.•The effectiveness of different COVID-19 vaccine brands. To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Studies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed. A total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6–92.6%), 97.2% (95% CI 96.1–98.3%), 97.4% (95% CI 96.0–98.8%), and 99.0% (95% CI 98.5–99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8–94.4%), 83.8% (95% CI 77.1–90.6%), and 95.3% (95% CI 92.0–98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%. The COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.
Objective: To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Methods: Studies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed. Results: A total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6–92.6%), 97.2% (95% CI 96.1–98.3%), 97.4% (95% CI 96.0–98.8%), and 99.0% (95% CI 98.5–99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8–94.4%), 83.8% (95% CI 77.1–90.6%), and 95.3% (95% CI 92.0–98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%. Conclusions: The COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.
To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings.OBJECTIVETo estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings.Studies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed.METHODSStudies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed.A total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6-92.6%), 97.2% (95% CI 96.1-98.3%), 97.4% (95% CI 96.0-98.8%), and 99.0% (95% CI 98.5-99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8-94.4%), 83.8% (95% CI 77.1-90.6%), and 95.3% (95% CI 92.0-98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%.RESULTSA total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6-92.6%), 97.2% (95% CI 96.1-98.3%), 97.4% (95% CI 96.0-98.8%), and 99.0% (95% CI 98.5-99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8-94.4%), 83.8% (95% CI 77.1-90.6%), and 95.3% (95% CI 92.0-98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%.The COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.CONCLUSIONSThe COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.
To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Studies reporting COVID-19 VE from August 6, 2020 to October 6, 2021 were included. The summary VE (with 95% confidence intervals (95% CI)) against disease related to COVID-19 was estimated. The results were presented in forest plots. Predefined subgroup analyses and sensitivity analyses were also performed. A total of 51 records were included in this meta-analysis. In fully vaccinated populations, the VE against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, COVID-19-related hospitalization, admission to the intensive care unit, and death was 89.1% (95% CI 85.6-92.6%), 97.2% (95% CI 96.1-98.3%), 97.4% (95% CI 96.0-98.8%), and 99.0% (95% CI 98.5-99.6%), respectively. The VE against infection in the general population aged ≥16 years, the elderly, and healthcare workers was 86.1% (95% CI 77.8-94.4%), 83.8% (95% CI 77.1-90.6%), and 95.3% (95% CI 92.0-98.6%), respectively. For those fully vaccinated against infection, the observed effectiveness of the Pfizer-BioNTech vaccine was 91.2% and of the Moderna vaccine was 98.1%, while the effectiveness of the CoronaVac vaccine was found to be 65.7%. The COVID-19 vaccines are highly protective against SARS-CoV-2-related diseases in real-world settings.
Author Shao, Weihao
Chen, Xiaorui
Zheng, Caifang
Zhang, Weidong
Wang, Gaili
Zhang, Bowen
Author_xml – sequence: 1
  givenname: Caifang
  surname: Zheng
  fullname: Zheng, Caifang
– sequence: 2
  givenname: Weihao
  surname: Shao
  fullname: Shao, Weihao
– sequence: 3
  givenname: Xiaorui
  surname: Chen
  fullname: Chen, Xiaorui
– sequence: 4
  givenname: Bowen
  surname: Zhang
  fullname: Zhang, Bowen
– sequence: 5
  givenname: Gaili
  surname: Wang
  fullname: Wang, Gaili
– sequence: 6
  givenname: Weidong
  surname: Zhang
  fullname: Zhang, Weidong
  email: imooni@163.com
BackLink https://www.ncbi.nlm.nih.gov/pubmed/34800687$$D View this record in MEDLINE/PubMed
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Copyright 2021 Zhengzhou University
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2021 Zhengzhou University 2021
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Keywords COVID-19
SARS-CoV-2
Vaccine
Effectiveness
Real-world
Language English
License This is an open access article under the CC BY-NC-ND license.
Copyright © 2021 Zhengzhou University. Published by Elsevier Ltd.. All rights reserved.
Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
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Caifang Zheng and Weihao Shao contributed equally to this manuscript.
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  doi: 10.15585/mmwr.mm7011e3
– volume: 374
  start-page: n2015
  year: 2021
  ident: 10.1016/j.ijid.2021.11.009_bib0027
  article-title: Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study
  publication-title: BMJ
  doi: 10.1136/bmj.n2015
– year: 2021
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  article-title: BNT162b2 vaccine breakthrough: clinical characteristics of 152 fully-vaccinated hospitalized COVID-19 patients in Israel
  publication-title: Clin Microbiol Infect
  doi: 10.1016/j.cmi.2021.06.036
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  article-title: Evaluation of post-introduction COVID-19 vaccine effectiveness: Summary of interim guidance of the World Health Organization
  publication-title: Vaccine
  doi: 10.1016/j.vaccine.2021.05.099
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Snippet •This study reports COVID-19 vaccine effectiveness (VE) in real-world settings.•COVID-19 VE for fully and partially vaccinated individuals.•COVID-19 VE for...
To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Studies reporting COVID-19 VE...
To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings.OBJECTIVETo estimate the...
Objective: To estimate the coronavirus disease 2019 (COVID-19) vaccine effectiveness (VE) against concerned outcomes in real-world settings. Methods: Studies...
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StartPage 252
SubjectTerms Aged
COVID-19
COVID-19 Vaccines
Effectiveness
Hospitalization
Humans
Real-world
Review
SARS-CoV-2
Vaccine
Vaccine Efficacy
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Title Real-world effectiveness of COVID-19 vaccines: a literature review and meta-analysis
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https://dx.doi.org/10.1016/j.ijid.2021.11.009
https://www.ncbi.nlm.nih.gov/pubmed/34800687
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