The U.S. influenza rate is at or near its highest level in at least 15 years and is still on the rise, the U.S. Centers for ...

San Mateo County public health officials reported finding H5N1 bird flu in a pet cat and a backyard poultry flock.

Two state health departments have issued new guidance on testing for the bird flu, following a CDC advisory, even as it says ...

Local health officials are warning about a second wave of the flu, with rising infection rates reported by the CDC.