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. 2021 Jul 1;11:13705. doi: 10.1038/s41598-021-91662-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Comparative expansion of SARS-CoV-2 variants in different countries: (a) time of first reported D614/P323 sequence versus first reported G614/L323 sequence (blue bars: D614/P323 appeared before G614/L323; black bars: D614/P323 appeared before G614/L323). (b) Percent of sequences of a given variant in the 14-day time period after its first appearance in a given country (100% is total number of sequences during the 14-day time period). Only countries with at least 5 sequences collected during 14 days after the appearance of first sequence are used (c) mean ± SEM of emergence of the variants in different countries with at least 5 sequences within the first 14 days.