Gov. Newsom declared a state of emergency as the virus continues to infect dairy herds across the country — including more than 600 in California.

The bird flu outbreak has spread to all 50 states, these maps show. Here are the symptoms and what to do if you think you might be infected.

Flu activity is spiking across Southern California, which is leading to a concerning number of pediatric hospitalizations. Doctors said the threat of bird flu is making this season particularly concerning.