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Covid-19: How many variants are there, and what do we know about them?

BMJ 2021; 374 doi: https://doi.org/10.1136/bmj.n1971 (Published 19 August 2021) Cite this as: BMJ 2021;374:n1971

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Article usage

Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.

Usage statistics: August 2021 to April 2024

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AbstractFullPdf
Aug 202133398283102
Sep 20212940370920
Oct 20211010654353
Nov 20211639996320
Dec 20211964913303
Jan 20221538068204
Feb 20221111415102
Mar 2022211286108
Apr 202248674124
May 202205571118
Jun 20222384241
Jul 20222518252
Aug 20222354045
Sep 20221329034
Oct 20220349637
Nov 20220321133
Dec 20221247232
Jan 20231263825
Feb 20231126822
Mar 20230101623
Apr 2023194324
May 2023193627
Jun 2023168516
Jul 2023151823
Aug 2023099634
Sep 2023067726
Oct 2023141131
Nov 202303878
Dec 2023446320
Jan 2024053815
Feb 2024243820
Mar 2024451035
Apr 2024326618
Total1673084986295
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