Bird flu continues to spread across the U.S., with new infections in Hawaii and continued human outbreaks in California.

In 2009, H1N1 bird flu caused the first global flu pandemic in 40 years, with the first infections detected in California.

California health officials reported Tuesday that a child in Alameda Co. has been infected with bird flu; source unknown.

Alameda County health officials are investigating a potential case of avian influenza, or bird flu, in a child experiencing ...

Health officials have announced six more H5N1 bird flu infections in humans: five in California and the first known case in ...

Cases of H5N1 bird flu in U.S. dairy and poultry workers have largely been mild. However, a new case in a British Columbia ...

H5N1 bird flu raises alarm as human cases emerge in California and Oregon. Discover the implications and ongoing health ...

A Bay Area child tested positive for bird flu. Other California cases were traced to cattle and dairy farms in the Central ...

Avian influenza H5N1 infection in humans has spread to seven U.S. states, growing from 46 cases last week to 52 cases this week.

More than half a colony of Caspian terns on a small island near Port Townsend died last year amid an outbreak of bird flu, ...