The patient in Louisiana who was hospitalized with severe bird flu illness was found to have a mutated version of the virus.

Most human cases of bird flu in North America have been mild, a fact that’s underscored by a new study of the first 46 ...

Another brand of raw pet food has been found to contain bird flu and has made at least five house cats presumably sick with ...

L.A. County public health officials are reupping their warning to pet owners: Do not feed pets raw food. More cats have been ...

All year, I’ve been keeping tabs on the H5N1 avian flu outbreak in dairy cattle and birds in the United States. As a ...

FDA may impose measures ‘such as a recall, follow-up inspection or other possible responses to protect public health’ ...

In a positive finding, the CDC emphasized that there is no evidence the virus has spread from the Louisiana patient to others ...

A virologist explains that why this probably isn’t the big one — but that it’s a sign of bad things happening with the virus.

The Centers for Disease Control and Prevention is keeping close eye on pandemic indicators amid bird flu cases arising in the United States.

The call to authorize a vaccine comes after the CDC announced that a person in Louisiana was hospitalized with the country's first known case of severe illness caused by the virus earlier this month.

The virus is spreading among animals, while viral mutations raise concerns about potential adaptation to human hosts.