CNN reports a Nevada dairy worker may have been infected by deadly D1.1 version of H5N1 bird flu Worker shows only mild symptoms Genetic analyses of this version show changes that could make it ...

The finding indicates that the virus, known as H5N1, has spilled from birds into cows at least twice — leading to these two sets of infections — and that it could continue to do so.

Cows in Nevada have been infected with a strain of H5N1 bird flu different from the strain detected in all other herds to this point in the ongoing dairy outbreak. It's the same strain that killed ...