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. 2022 Jan 12;7(1):e00809-21. doi: 10.1128/msphere.00809-21

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FIG 1 — Time scaled phylogenies demonstrating time of spillover of human seasonal H3N2 virus into swine. (A) Bayesian phylogenetic tree of the H3.2010.2 HA, including human seasonal H3 HA sequences. (B) Bayesian phylogenetic tree of the H3.2010.2 N2 NA, including human seasonal N2 NA sequences. Human H3-HA and N2-NA data are colored gray, swine data (H3.2010.1) are colored black, and H3. 2010.2 data are colored blue. The asterisk indicates the spillover event from humans to swine.