TY - RPRT TI - Genetic evolution analysis of hemagglutinin and neuraminidase genes of H9N2 avian influenza virus in external environment of some areas of Yunnan Province, China from 2020 to 2023 AU - Liu, Z. AU - Chen, Y. AU - Fu, X.-Q. AU - Sun, Y. AU - Zhang, M.-L. AU - Han, X. AU - Zhao, X. AU - Zhou, J. PY - 2024 DO - 10.1101/2024.02.24.581849 UR - https://www.biorxiv.org/content/10.1101/2024.02.24.581849v1 ID - 10.1101/2024.02.24.581849 ER -