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Poland reports an outbreak of highly pathogenic H5N1 avian influenza on poultry farms in Susz,

2020–2025 H5N1 outbreak — Poland reports an outbreak of highly pathogenic H5N1 avian influenza on poultry farms in Susz, Warmian–Masurian Voivodeship, where around 4,000 birds have died. [https://www.reuter

Published September 22, 2025· Updated October 28, 2026·1 min read

Context: 2020–2025 H5N1 outbreak.

Poland reports an outbreak of highly pathogenic H5N1 avian influenza on poultry farms in Susz, Warmian–Masurian Voivodeship, where around 4,000 birds have died. [https://www.reuters.com/business/healthcare-pharmaceuticals/poland-reports-bird-flu-outbreak-farms-north-woah-says-2025-09-22/ (Reuters)]

Event summary via Wikipedia Current Events (2025-09-22).