A nasty stomach bug has been spreading across the country, including California, in recent months—leaving people feeling ...

The CDC says a new strain of norovirus now makes up a majority of outbreaks and that could be why it's spreading so quickly.

The Centers for Disease Control and Prevention (CDC) has selected University of California San Diego as one of three partner institutions to establish a groundbreaking pandemic preparedness initiative ...

The rise of bird flu across farms in California has raised questions about the virus and its potential threat to humans.

Gary Hall Jr. said he fled his house in Pacific Palisades with the shoes on his feet and left everything, including his Olympic medals, behind.

Though risk of infection remains low for the general public, according to the CDC, California officials declared the emergency to ensure a swift and coordinated statewide response to the outbreak.

Santa Ana winds in Southern California are often-fierce winds that topple power lines and trees and can turn a spark into a ...

The CDC called findings about bird flu mutations in a human case “concerning” but says the risk to the general public from the outbreak “remains low.” ...

Flu is taking off in the U.S., with 40 states reporting high or very high levels of flu-like illness last week.