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. 2021 Apr 11;9(4):412. doi: 10.3390/biomedicines9040412

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Distribution of frequent variants across the SARS-CoV-2 proteins in different geographic areas. (A) Frequencies of the top 30 variants, with the highest variant frequencies in different continents. (B) Temporal and geographic dynamics of frequent SARS-CoV-2 variants. The vertical axis represents the moving-window variant frequency calculated by dividing the number of sequences containing a specific variant, 15 days before and after a specific date, by the total number of sequences in the period (31 days).