Influenza A virus subtype H9N2 (A/H9N2) is a subtype of the species Influenza A virus (bird flu virus).[1][2]
Since 1998 a total of 86 cases of human infection with H9N2 viruses have been reported.[3]
^Guan Y, Shortridge KF, Krauss S, Webster RG (August 1999). "Molecular characterization of H9N2 influenza viruses: were they the donors of the "internal" genes of H5N1 viruses in Hong Kong?". Proc. Natl. Acad. Sci. U.S.A. 96 (16): 9363–7. Bibcode:1999PNAS...96.9363G. doi:10.1073/pnas.96.16.9363. PMC 17788. PMID 10430948.
^NAID NIH Archived 2010-03-06 at the Wayback Machine
^"COMMUNICABLE DISEASE THREATS REPORT Week 16, 18-24 April 2021" (PDF). European Centre for Disease Prevention and Control. 23 April 2021. Retrieved 23 April 2021.
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