All H5N1 articles
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NewsH5N1 influenza outbreaks in US cattle likely triggered by ‘milk-stealing’ behavior of lactating cows
As of June 2025, H5N1 outbreaks have been reported on more than 1,070 dairy farms across 17 US states. Researchers have solved the mystery of how H5N1 virus enters the mammary glands of dairy cows, and provide a strategy on how to control the disease.