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. 2023 May 11;14:1186869. doi: 10.3389/fmicb.2023.1186869

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Copyright © 2023 Meng, Li, Feng, Guo, Feng, Zhu, Chen and Zhang.

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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Phylogenetic analysis of the NA genes of H3N2 CIVs. It is based on nucleotide positions 20–1,429 for NA. Isolates in this study are colored red. The scale bar indicates the number of nucleotide substitutions per site.