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Article

Multiple introductions of highly pathogenic avian influenza viruses into the High Arctic: Svalbard and Jan Mayen, 2022-2025.

The Journal of general virology - 1 Aug 2026

Granstad Silje, Tønnessen Ragnhild, Ytrehus Bjørnar, Descamps Sebastien, Moe Børge, Strøm Hallvard, Gabrielsen Geir Wing, Hanssen Sveinn Are, Rønning Egil, Tronerud Ole-Herman, Loonen Maarten J J E, Gjerset Britt, Mjelde Hans Kristian, Madslien Knut, Åkerstedt Johan, Bøe Cathrine Arnason

Abstract excerpt

Between 2022 and 2025, highly pathogenic avian influenza viruses (HPAIVs) of clade 2.3.4.4b, including four distinct H5 Eurasian (EA) genotypes, were detected in wild birds and mammals in the Svalbard Archipelago and on the island of Jan Mayen. We describe their epidemiology and genomic characteristics to improve understanding of HPAIV occurrence and transmission in the High Arctic. The initial cases in 2022...

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PMID: 42606890
DOI: 10.1099/jgv.0.002305
PMCID: PMC13481042

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