Abstract

A severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variant, VOC 202012/01 (lineage B.1.1.7), emerged in southeast England in September 2020 and is rapidly spreading toward fixation. Using a variety of statistical and dynamic modeling approaches, we estimate that this variant has a 43 to 90% (range of 95% credible intervals, 38 to 130%) higher reproduction number than preexisting variants. A fitted two-strain dynamic transmission model shows that VOC 202012/01 will lead to large resurgences of COVID-19 cases. Without stringent control measures, including limited closure of educational institutions and a greatly accelerated vaccine rollout, COVID-19 hospitalizations and deaths across England in the first 6 months of 2021 were projected to exceed those in 2020. VOC 202012/01 has spread globally and exhibits a similar transmission increase (59 to 74%) in Denmark, Switzerland, and the United States.

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This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/. This license does not apply to figures/photos/artwork or other content included in the article that is credited to a third party; obtain authorization from the rights holder before using such material.

Cite as

Davies, N., Abbott, S., Barnard, R., Jarvis, C., Kucharski, A., Munday, J., Pearson, C., Russell, T., Tully, D., Washburne, A., Wenseleers, T., Gimma, A., Waites, W., Wong, K., van Zandvoort, K., Silverman, J., CMMID COVID-19 Working Group, COVID-19 Genomics UK (COG-UK) consortium, Diaz-Ordaz, K., Keogh, R., Eggo, R., Funk, S., Jit, M., Atkins, K. & Edmunds, W. 2021, 'Estimated transmissibility and impact of SARS-CoV-2 lineage B.1.1.7 in England', Science, 372(6538), article no: eabg3055. https://doi.org/10.1126/science.abg3055

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Last updated: 30 June 2023
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