There is no evidence the youngster was exposed to livestock or any infected animals, deepening the mystery about the spread of H5N1 bird flu.

A study at Iowa State University is seeking to determine whether bird flu, found in cows' milk, can also show up in other ...

The first person to contract H5N5 avian influenza, a rare strain of the disease known as bird flu, died in Washington state Friday. The state’s Department of Health said in a release the resident of ...

Bird flu has the potential to spread to more animal species and could mix with seasonal flu, making it easier to spread among humans, according to scientists behind a new study from Iowa State ...

Although bird flu infections in humans remain rare, this case marks a significant development in flu surveillance in the U.S.

A human case of H5N1, also known as bird flu, has been identified in Texas, according to the Centers for Disease Control and Prevention. The federal agency notes the risk to the public remains low.

A Washington resident died of complications from an infection with a bird flu strain never before reported in humans, the state Department of Health said on Friday.

A Washington state resident has tested positive for bird flu, marking the first human case in the U.S. in nine months, and with a strain only seen in animals before.

An individual with the first-ever human case of H5N5 avian influenza has died, according to Washington State health officials. The person was an older adult with underlying health conditions that were ...

Wild birds recently found at locations across Los Angeles County — including in the San Fernando Valley — have tested ...

Three suspected cases of bird flu, or highly pathogenic avian influenza, have been discovered in Salina, the city said ...