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

Bird flu H5N1 is infecting people in the U.S. See the map of cases. Could it trigger the next pandemic? Experts explain the threat and symptoms to watch for.

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

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 ...

A backyard flock of birds in Vermont tested positive for bird flu last week, state officials announced Thursday. The Vermont ...

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.

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 ...

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.

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

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

The Centers for Disease Control and Prevention on Thursday urged labs nationwide to determine within 24 hours of admission whether people hospitalized with the flu have seasonal influenza or are ...

Maine officials are urging bird owners to take precautions after avian flu was confirmed in a backyard flock in Penobscot ...