Knowing vaccine effectiveness (VE) against variants of concern (VOCs) in the real-world
setting is essential for public health decision-making. A systematic landscape of the VE …

Background It was urgent and necessary to synthesize the evidence for vaccine
effectiveness (VE) against SARS-CoV-2 variants of concern (VOC). We conducted a …

Abstract Coronavirus disease 2019 (COVID-19) vaccines have yielded definitive prevention
and major reductions in morbidity and mortality from severe acute respiratory syndrome …

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 …

In December 2019, an outbreak emerged of severe acute respiratory syndrome coronavirus
2 (SARS-CoV-2) which leads to coronavirus disease 2019 (COVID-19). The World Health …

Background: With the emergence and spread of new SARS-CoV-2 variants, concerns are
raised about the effectiveness of the existing vaccines to protect against these new variants …

Introduction COVID-19 vaccines have been highly effective in reducing morbidity and
mortality during the pandemic. However, the emergence of the Omicron variant and …

Knowledge of real-world performance of coronavirus disease 2019 (COVID-19) vaccines is
critically important for informing pandemic vaccination strategy and policy. As severe acute …

Background Currently, promoted vaccinations against SARS-CoV-2 are being given out
globally. However, the occurrence of numerous COVID-19 variants has hindered the goal of …

Abstract Coronavirus disease 2019 (COVID‐19) is an ongoing pandemic, which affected
around 45 million confirmed cases of COVID‐19, including more than 6 million deaths …