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Phylogenetic analysis of the NA genes of the H10N4 and H10N8 viruses. (A) NA phylogenetic tree of H10N4 viruses. (B) NA phylogenetic tree of H10N8 viruses. The sequence names in green and blue indicate the H10N8 viruses we isolated in this study, and the sequence of A/whooper swan/Shandong/SC195/2021 (H5N8) is that of the H5N8 virus isolated in our previous study. The phylogenetic tree was constructed by MEGA 7.0 with the neighbor-joining method.
