We analysed 9,030 variant-specific RT-PCR tests performed on SARS-CoV-2-positive
samples collected in France between 31 May and 21 June 2021. This analysis revealed …

We compared PCR results from SARS-CoV-2-positive patients tested in the community in
France from 14 June to 30 July 2021. In asymptomatic individuals, Cq values were …

Background The Delta variant of SARS-CoV-2 had become predominant globally by
November 2021. Aim We evaluated transmission dynamics and epidemiological …

Two new SARS-CoV-2 lineages with the N501Y mutation in the receptor-binding domain of
the spike protein spread rapidly in the United Kingdom. We estimated that the earlier 501Y …

Summary Background In May, 2021, the delta (B. 1.617. 2) SARS-CoV-2 variant became
dominant in the UK, superseded by the omicron (B. 1.1. 529) variant in December, 2021 …

We present a global analysis of the spread of recently emerged SARS-CoV-2 variants and
estimate changes in effective reproduction numbers at country-specific level using sequence …

Using numbers of SARS-CoV-2 variants detected in Japan as at 13 June 2021, relative
instantaneous reproduction numbers (RRI) of the R. 1, Alpha, and Delta variants with …

The emergence of SARS-CoV-2 variant 20I/501Y. V1 (VOC-202012/1 or GR/501Y. V1) is
concerning given its increased transmissibility. We reanalysed 11,916 PCR-positive tests …

Some variants of SARS-CoV-2 are associated with increased transmissibility, increased
disease severity or decreased vaccine effectiveness (VE). In this population-based cohort …

Following emergence of the SARS-CoV-2 variant Omicron in November 2021, the dominant
BA. 1 sub-lineage was replaced by the BA. 2 sub-lineage in Denmark. We analysed the first …