Article
Emergence of mammalian-adaptive PB2 mutations enhances polymerase activity and pathogenicity of cattle-derived H5N1 influenza A virus.
Nature communications - 20 Dec 2025
Zhang Lei, Lai Yuerong, Cui Yingzi, Yang Qiuxian, Shao Yuekun, Ding Shenyang, Wang Haojie, Wang Liang, Gao George Fu, Deng Tao
Abstract excerpt
Highly pathogenic avian influenza H5N1 poses an increasing public health risk, particularly following its spillover into dairy cows and associated human infections in the U.S. since March 2024. Here, we systematically identified critical PB2 mutations emerged during avian-to-cattle transmission and subsequent adaptation in cattle, notably PB2 M631L, which conferred pathogenicity in mice comparable to the...
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