Add Yahoo as a preferred source to see more of our stories on Google. Cows are the latest in a long line of H5N1 animal infections - Jim Vondruska/REUTERS The number of cow herds across the US testing ...

In June, when it became clear that the U.S. monkeypox outbreak that had begun a month before was not going to just peter out, federal officials met the outbreak with confidence. The pool of at-risk ...