Authorities in San Mateo County urged residents to take precautions after two cases of bird flu were detected in the county.

A new Centers for Disease Control and Prevention study suggests that bird flu may be spreading under the radar in the U.S. In ...

Veterinarians examined it, and lab results on Tuesday confirmed the cat had H5N1, or avian influenza, according to San Mateo County health officials. It's not known how the cat became infected ...

When it comes to the potential of H5N1 avian flu, otherwise known as bird flu, picking up mutations that may lead to human-to ...

NEW BRAUNFELS, Texas - Multiple black vultures at Landa Park have died from avian flu. The Texas Parks and Wildlife Division ...