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. 2021 Apr 12;12:2188. doi: 10.1038/s41467-021-22366-y

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — The number of geographical sites included at each stage of analysis is noted. Reasons for exclusion for the 34 sites removed are detailed in the Supplementary Information (section 1B). SEIJR Susceptible-Exposed-Infected (IJ)-Recovered, CEST central epidemic seeding time, NPI: non-pharmaceutical intervention. GISAID database https://www.gisaid.org/.