Bird flu could spread to cows outside US, head of WHO flu program says

A World Health Organization official said on Tuesday there was a risk of H5N1 bird flu virus spreading to cows in other countries beyond the United States through migratory birds.

U.S. officials are seeking to verify the safety of milk and meat after confirming the H5N1 virus in 34 dairy cattle herds in nine states since late March, and in one person in Texas.

"With the virus carried around the world by migratory birds, certainly there is a risk for cows in other countries to be getting infected," said Wenqing Zhang...