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. 2021 Nov 2;11:21484. doi: 10.1038/s41598-021-01022-x

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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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Phylogenetic analysis of SARS-CoV-2 genome sequences generated with respect to globally representative reference data sets. Smith-Waterman phylogenetic alignment of (A) spring and (B) summer samples on globally representative reference data sets (obtained from Nextstrain, sampled from GISAID^25–27). The circles represent the viral genomes found in respective sample pools. The clades to which the specimens belong are indicated in the legends while global virus lineages identified to date are indicated on the tree. The phylogenetic tree was generated using Nextclade (version 0.14.2)²⁷. (C) Bar graph highlighting the breakdown of viral lineages observed in spring and summer samples.