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Genomic analysis of high pathogenicity avian influenza viruses from Antarctica reveals multiple introductions from South America

7 Apr 2026

Abstract excerpt

The spread of high pathogenic avian influenza virus (HPAIV) H5N1 clade 2.3.4.4b into Antarctica poses a major threat to polar wildlife. We report the detection of H5N1 in carcasses of eight species during the 2023-2024 and 2024-2025 austral summers in the South Shetland Islands: Antarctic shag, Antarctic tern, kelp gull, pintado petrel, Antarctic petrel, skuas, Antarctic fur seal, and southern elephant seal....

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PMID: 41942444
DOI: 10.1038/s41467-026-71544-3

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