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 …

With the constantly mutating of SARS-CoV-2 and the emergence of Variants of Concern
(VOC), the implementation of vaccination is critically important. Existing SARS-CoV-2 …

Background: To date, coronavirus disease 2019 (COVID-19) becomes increasingly fierce
due to the emergence of variants. Rapid herd immunity through vaccination is needed to …

Abstract Background The B. 1.617. 2 (delta) variant of the severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (Covid-19) …

We report that in a cohort of 45,965 adults, who were receiving either the ChAdOx1 or the
BNT162b2 SARS-CoV-2 vaccines, in those who had no prior infection with SARS-CoV-2 …

The effectiveness of COVID-19 vaccination in preventing new severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) infections in the general community is still unclear …

The effectiveness of the BNT162b2 and ChAdOx1 vaccines against new severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) infections requires continuous re …

Objective To evaluate the effectiveness of heterologous and homologous covid-19 vaccine
regimens with and without boosting in preventing covid-19 related infection, hospital …

Background Vaccination, one of the most important and effective ways of preventing
infectious diseases, has recently been used to control the COVID-19 pandemic. The present …

Emergency use authorisations granted by the US Food and Drug Administration for three
SARS-CoV-2 vaccines represent an important milestone in the response to the COVID-19 …