A shift in the H5N1 virus has allowed it to spread more easily from birds to cows, raising concerns about its evolution.

Dairy cattle in Nevada have been infected with a new type of bird flu that's different from the version that has spread in ...

A new strain of bird flu has been detected in US dairy cattle, raising concerns about its potential transmission and impact ...

Dairy cattle in Nevada have been found to be infected with a new type of bird flu, distinct from the one that has been ...

Symptoms of avian flu include fever, cough, sore throat and sometimes severe respiratory diseases and pneumonia.