Objective To establish whether there is any change in mortality from infection with a new
variant of SARS-CoV-2, designated a variant of concern (VOC-202012/1) in December …

Objective To evaluate the relation between diagnosis of covid-19 with SARS-CoV-2 variant
B. 1.1. 7 (also known as variant of concern 202012/01) and the risk of hospital admission …

VOC 202012/01, a SARS-CoV-2 variant first detected in the United Kingdom in September
2020, has spread to multiple countries worldwide. Several studies have established that this …

The SARS-CoV-2 B. 1.1. 7 variant of concern (VOC) is increasing in prevalence across
Europe. Accurate estimation of disease severity associated with this VOC is critical for …

Summary Background The SARS-CoV-2 variant B. 1.1. 7 was first identified in December,
2020, in England. We aimed to investigate whether increases in the proportion of infections …

Introduction Since their emergence, SARS-CoV-2 variants of concern (VOC) B. 1.1. 7 and B.
1.351 have spread worldwide. We estimated the risk of hospitalisation and admission to an …

Background The omicron variant (B. 1.1. 529) of SARS-CoV-2 has demonstrated partial
vaccine escape and high transmissibility, with early studies indicating lower severity of …

Background: Between February and June 2021, the initial wild-type strains of SARS-CoV-2
were supplanted in Ontario, Canada, by new variants of concern (VOCs), first those with the …

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 …

Objectives To derive and validate risk prediction algorithms (QCOVID4) to estimate the risk
of covid-19 related death and hospital admission in people with a positive SARS-CoV-2 test …