Two cats that belonged to Michigan dairy workers exposed to bird flu died after being infected with the virus last year.

A new study shows the bird flu has silently spread from animals to some veterinarians.

The U.S. government has ordered testing of the nation’s milk supply for bird flu to better monitor the spread of the virus in dairy cows.

U.S. officials pledged nearly $200 million in new spending and other efforts Friday to help track and contain an outbreak of bird flu in the nation's dairy cows.