A second type of bird flu has been found in U.S. dairy cows for the first time, the U.S. Department of Agriculture announced.

While the risk to humans of exposure from cows or milk remains low, this new flu spillover from birds into cows raises the need for continued surveillance.

The finding indicates that the virus, known as H5N1, has spilled from birds into cows at least twice — leading to these two ...

A version of the avian influenza virus different from the one rampaging through herds since last spring has been detected in ...

On January 31, 2025, the U.S. Department of Agriculture announced that dairy cows in Nevada have been infected with a new ...