The United States is seeing a second peak in flu cases this season. After doctor’s office visits for flu dipped early this year, they jumped past the previous season peak at the end of last month, with a 30% test positivity rate — and there are still months to go.

For a second time this season, at least 41 states are reporting high or very high levels of the flu. Here's how to stay safe.

Dr. Mallika Marshall explains that at-home tests can save you a trip to the doctor's office as flu season begins in the U.S.

A stray cat in San Mateo County recently tested positive for bird flu, officials said Thursday. The case is not related to an H5N1 incident involving a backyard poultry flock in San Mateo, according to the county executive’s office.

After bird flu was detected in a stray cat in Half Moon Bay this week, health officials in San Mateo County are urging pet owners to contact a veterinarian if their pet shows any symptoms of the virus.