Another spillover of the H5N1 bird flu virus from wild birds to dairy cattle appears to have occurred, this time in Arizona.
U.S. dairy cattle tested positive for a strain of bird flu that previously had not been seen in cows, the U.S.
A sample of milk from a herd of dairy cows in Maricopa County has tested positive for H5N1 avian influenza, or bird flu, according to the Arizona Department of Agriculture.
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