The CDC describes rat lungworm as a parasite found in rats, whose larvae are shed in rat feces and then taken up by snails ...

Viral mismatch between circulating strains and vaccine may have weighed down effectiveness ...

A neurological disease spread by rats and other animals may have become established in San Diego County.

A little-known virus that causes nasty flu-like symptoms is spreading in California — and it doesn’t have a vaccine. Cases of human metapneumovirus (HMPV) have been steadily rising since winter began, ...

CDC leadership announced in early January that the agency would dramatically reduce the number of vaccines recommended for all American children.

California mountain biker Julian Hernandez, 25, suffers rare death after a rattlesnake bite at Quail Hill preserve in Irvine ...

California and 14 other states are suing the CDC, calling the recommendations a departure from standard medical advice that ignored federal laws.

As the Trump administration shakes up recommendations for childhood vaccines, some states are moving to ensure vaccines remain free and health care workers are protected from lawsuits.

Human metapneumovirus, a little-known respiratory virus, is circulating in Northern California as flu and COVID cases decline.

The Trump administration's severe cuts to CDC funding have significantly contributed to the lack of consistent and reliable public health messaging, some experts say ...