Another spillover of the H5N1 bird flu virus from wild birds to dairy cattle appears to have occurred, this time in Arizona.

A fungus that has killed millions of bats across North America has arrived in Arizona, state wildlife officials announced on Thursday.

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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Arizona has added a new species of bat to the list of night-flying creatures that frequent the state. The recent confirmation ...