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. 2021 Mar;26(9):2100133.
doi: 10.2807/1560-7917.ES.2021.26.9.2100133.

Early assessment of diffusion and possible expansion of SARS-CoV-2 Lineage 20I/501Y.V1 (B.1.1.7, variant of concern 202012/01) in France, January to March 2021

Alexandre Gaymard  1   2   3 , Paolo Bosetti  3   4 , Adeline Feri  3   5 , Gregory Destras  1   2 , Vincent Enouf  6 , Alessio Andronico  4 , Sonia Burrel  7 , Sylvie Behillil  6 , Claire Sauvage  5 , Antonin Bal  1   2 , Florence Morfin  1   2 , Sylvie Van Der Werf  6 , Laurence Josset  1   2 ; ANRS MIE AC43 COVID-19  8 ; French viro COVID group  8 ; François Blanquart  9   10 , Bruno Coignard  11   5 , Simon Cauchemez  11   4 , Bruno Lina  1   11   2
Collaborators, Affiliations

Early assessment of diffusion and possible expansion of SARS-CoV-2 Lineage 20I/501Y.V1 (B.1.1.7, variant of concern 202012/01) in France, January to March 2021

Alexandre Gaymard et al. Euro Surveill. 2021 Mar.

Erratum in

  • Correction for Euro Surveill. 2020;26(9).
    Eurosurveillance editorial team. Eurosurveillance editorial team. Euro Surveill. 2021 Mar;26(10):210311c. doi: 10.2807/1560-7917.ES.2021.26.10.210311c. Euro Surveill. 2021. PMID: 33706860 Free PMC article. No abstract available.

Abstract

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 (41% of all positive tests) performed on 7-8 January 2021 in France. The prevalence of 20I/501Y.V1 was 3.3% among positive tests nationwide and 6.9% in the Paris region. Analysing the recent rise in the prevalence of 20I/501Y.V1, we estimate that, in the French context, 20I/501Y.V1 is 52-69% more transmissible than the previously circulating lineages, depending on modelling assumptions.

Keywords: 20I/501Y.V1; COVID; France; SARS-CoV-2; mutation; surveillance; viral infections.

PubMed Disclaimer

Conflict of interest statement

Conflict of interest: None declared.

Figures

Figure 1
Figure 1
Distribution of 501Y.V1 cases by location of sampling laboratories, Flash#1 survey, France, 7–8 January 2021
Figure 2
Figure 2
Estimated increase in transmissibility of the 501Y, Flash surveys, France, January 2021
See this image and copyright information in PMC

References

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