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. 2021 Apr 15;12:662028. doi: 10.3389/fmicb.2021.662028

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Copyright © 2021 Danilenko, Komissarov, Fadeev, Bakaev, Ivanova, Petrova, Vassilieva, Komissarova, Zheltukhina, Konovalova and Vasin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Maximum likelihood tree for swine influenza A HA (A) and NA (B) of H1N1pdm09 isolated in 2014. The vaccine strain at that time is shown in blue. Reference strains are in black bold. Swine strains from this study are shown in red.