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 continuation of the pandemic, many severe acute respiratory syndrome coronavirus
2 (SARS-CoV-2) variants have appeared around the world. Owing to a possible risk of …

Objectives To derive and validate risk prediction algorithms to estimate the risk of covid-19
related mortality and hospital admission in UK adults after one or two doses of covid-19 …

Objective To assess the risk of covid-19 death after infection with omicron BA. 1 compared
with delta (B. 1.617. 2). Design Retrospective cohort study. Setting England, United …

The COVID-19 pandemic has been accompanied by SARS-CoV-2 evolution and
emergence of viral variants that have far exceeded initial expectations. Five major variants of …

Background Individual case series and cohort studies have reported conflicting results in
people with asthma on the vulnerability to and risk of mortality from coronavirus disease …

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) alpha
variant (B. 1.1. 7) is associated with higher transmissibility than wild-type virus, becoming the …

This retrospective multi-center matched cohort study assessed the risk for severe COVID-19
(combination of severity indicators), intensive care unit (ICU) admission, and in-hospital …

Background: From the start of the COVID-19 pandemic, new SARS-CoV-2 variants have
emerged that potentially affect transmissibility, severity, and immune evasion in infected …

The ongoing COVID-19 pandemic caused by severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) has become a global threat. Despite strict control measures …