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H5N1 bird flu was circulating in dairy cows for four months before it was detected, USDA scientists say
By Brenda Goodman, CNN (CNN) — Bird flu was probably circulating in dairy cows for at least four months before it was confirmed to be the highly pathogenic H5N1 virus, according to a new analysis of genomic data by scientists at the US Department of Agriculture’s Animal Disease Center. The research also found infected cattle
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