Dominant subtype switch in avian influenza viruses during 2016-2019 in China.

Nat Commun · 2020 · PMC7679419 · PMID 33219213

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an increasing trendno p-value reported

In fact, sporadic human cases caused by H7N9, H5N6, and H9N2 continue to be reported 5 , 57 , and the seroprevalence rate of H9N2 AIVs in the poultry workers posed an increasing trend after 2009 in China 7 , 58 .

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