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Clade 2.3.4.4b H5N1 neuraminidase has a long stalk, which is in contrast to most highly pathogenic H5N1 viruses circulating between 2002 and 2020

26 Feb 2025

Abstract excerpt

Since 2020, H5N1 highly pathogenic avian influenza (HPAI) viruses of clade 2.3.4.4b have been rapidly spreading in wild birds but have also caused a large number of mammalian infections and more than 70 known human cases. Importantly, this H5N1 clade has also crossed the species barrier into dairy cattle in the US in late 2023/early 2024. The neuraminidase (NA) protein of the N1 subtype can feature truncations in...

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PMID: 40008897
DOI: 10.1128/mbio.03989-24

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