Bird flu spread in dairy cows for months before it was detected. How did officials miss it?
Briefly

The H5N1 bird flu virus has been spreading undetected in dairy cows since November, with confirmed cases in 36 herds across nine states, sparking concerns about a potentially wider outbreak and mutation risks.
Even though remnants of the bird flu virus have been found in milk, experts reassure that pasteurized milk is safe; the concern now lies in the virus's mutation potential and its threat to human health.
Read at Fast Company
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