Canada has also just reported its first known case of bird flu in humans, a teenager who is currently in a critical condition ...

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

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

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

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

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

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 ...

In an indication that the bird flu outbreak is "headed in the wrong direction," sequencing of the virus that has stricken a ...

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

A child in California has tested positive for bird flu, despite having no known contact with infected animals, stat ...

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