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. 2021 Nov;27(11):2957–2960. doi: 10.3201/eid2711.211198

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Time-scaled maximum likelihood Bayesian phylogeographic maximum clade credibility tree of 59 severe acute respiratory syndrome coronavirus 2 lineage P.1 whole-genome sequences from Uruguay and 691 reference sequences from South America. The tree was rooted with the EPI_ISL_833137 sequence from GISAID (https://www.gisaid.org), collected December 4, 2020. Branches are colored according to the most probable location state of their descendant nodes as indicated at the legend. Sequences from Uruguay are shown with dots at the end of the branch. Red shading indicates clades from Uruguay and their distribution along the P.1 tree demonstrates >12 independent introductions and locally transmitted clusters of 3–24 sequences. The tree suggests Brazil has been the source of P.1 dissemination to Uruguay and other countries in South America.