Bird flu outbreak spreads among cows in US, scientists surprised

AMES, Iowa: Forty-three scientists working with pigs, cows, and other animals at the National Animal Disease Center, a government research facility in Ames, Iowa, are investigating how bird flu is currently spreading through U.S. animals and working on ways to stop it.

They are testing a cow vaccine designed to stop the continued spread of the virus and, hopefully, reduce the risk of it someday becoming a widesp