At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state agriculture officials confirmed Wednesday, and respiratory symptoms like ...

The current bird flu outbreak has already affected cattle in at least nine states, based on reports compiled by the United States Department of Agriculture (USDA). (Photo by Matthew Ludak for The ...

The H5N1 bird-flu virus has infected a third person in the US, this time with respiratory symptoms. The new patient's cough and sore throat could help the virus get better at infecting humans.

The patient was hospitalized in Louisiana, the health agency said. The Centers for Disease Control and Prevention (CDC) has confirmed the first case of severe bird flu in the United States. The ...