Abstract Coronavirus Disease 2019 (COVID-19) has been the most severe public health
challenge in this century. Two years after its emergence, the rapid development and …

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 The monoclonal-antibody combination AZD7442 is composed of tixagevimab
and cilgavimab, two neutralizing antibodies against severe acute respiratory syndrome …

Abstract Background The B. 1.1. 529 (omicron) variant of severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) was first identified on November 25, 2021, in Gauteng …

Background Vaccine effectiveness studies have not differentiated the effect of the delta (B.
1.617. 2) variant and potential waning immunity in observed reductions in effectiveness …

Background Waning of vaccine protection against severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) infection or coronavirus disease 2019 (Covid-19) is a concern …

Background Vaccines are critical cost-effective tools to control the coronavirus disease 2019
(COVID-19) pandemic. However, the emergence of variants of the severe acute respiratory …

The gastrointestinal tract is involved in coronavirus disease 2019 (COVID-19) caused by
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The gut microbiota has …

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 …

Severity of SARS-CoV-2 Reinfections as Compared with Primary Infections | New England Journal
of Medicine Skip to main content The New England Journal of Medicine homepage Advanced …