期刊
EMERGING INFECTIOUS DISEASES
卷 21, 期 5, 页码 842-846出版社
CENTERS DISEASE CONTROL & PREVENTION
DOI: 10.3201/eid2105.141927
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In 2014, novel highly pathogenic avian influenza A H5N2, H5N5, H5N6, and H5N8 viruses caused outbreaks in Asia, Europe, and North America. The H5 genes of these viruses form a monophyletic group that evolved from a clade 2.3.4 H5N1 variant. This rapid emergence of new H5Nx combinations is unprecedented in the H5N1 evolutionary history.
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