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. 2022 Jul 8;14(7):1494. doi: 10.3390/v14071494

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© 2022 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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Map of migration events between locations for Delta (A) and Omicron (B) variants. The thickness of the arrows reflects the average number of inferred transmission events between locations and the colors of the arrows indicate the timing of the transmission event. California counties and Mexico states are colored according to the number of sequences. All 10 replicates are combined to show the timing of the introductions of the clades in the region. See also Supplementary Figure S6 for the results of each of the 10 replicates. Only the migration events with strong support (BF ≥ 20) are shown.