December 2, 2025
Bird flu remains active in cheese made from raw milk for 120 days

Infectious H5N1 avian influenza virus can persist in raw-milk cheeses while they are being made and for up to 120 days of aging, depending on the milk’s acidity (pH) level, according to a report published in Nature Medicine. “Highly pathogenic avian influenza H5N1 viruses have recently spread to dairy cattle…
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