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.

A teenager diagnosed with bird flu in British Columbia is the first domestically acquired human case of H5N1 avian influenza, ...

A teenager in Canada is critically ill with the country's first human case of H5N1 bird flu. Health officials aren't sure how ...

British Columbia health officials have yet to identify a likely source of the infection, though none of the teen's contacts ...

A British Columbia teen who contracted Canada's first known human case of H5 bird flu has deteriorated swiftly in recent days ...

A teenager in British Columbia was hospitalized in critical condition with the disease, and officials were working to find ...

A teenager in British Columbia, Canada has been hospitalized with a presumed case of H5N1 bird flu, the first detected human ...

The H5N1 virus that infected a Canadian teen appears not to have spread, but it shows signs of mutation that makes flu ...

A teenager in Canada, hospitalized with the country's first case of the H5N1 bird flu, is in critical condition. Health ...