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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

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.
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https://hal.sorbonne-universite.fr/hal-03184264
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Submitted on : Monday, March 29, 2021 - 12:34:06 PM
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Alexandre Gaymard, Paolo Bosetti, Adeline Feri, Gregory Destras, Vincent Enouf, et al.. 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. Eurosurveillance, European Centre for Disease Prevention and Control, 2021, 26 (9), ⟨10.2807/1560-7917.ES.2021.26.9.2100133⟩. ⟨hal-03184264⟩

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