Dr. #BarbPetersen, a dairy #veterinarian in #Amarillo, #Texas, had been caring for sick cows for several weeks in March when she and a colleague finally pinned down the cause of the illness among the herd: the #H5N1 strain of the #BirdFlu.
It was the first time the #virus had been detected in #cattle.
During that same time, she said, dairy workers also fell ill. #US
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