A person in Louisiana contracted the nation's first serious human case of avian influenza, or bird flu, and was admitted to ...

"We're starting to see flu activity pick up for the season," Carrie Reed, from the CDC's influenza division, told Newsweek.

Newsweek has created a map showing which states have recorded the most human bird flu cases, after the first human case of ...

Another state has reported a possible case of human bird flu as overall figures rise in the U.S., increasing the risk of a ...

The Centers for Disease Control and Prevention (CDC) has identified mutations in a strain of the avian influenza virus H5N1, ...

Public health officials have just reported the first known “severe” case of bird flu in the United States. There are now 61 ...

The virus in the first severe human bird flu case in the U.S. was found to have mutated. Newsweek's live blog is closed.

The bird flu outbreak has spread to all 50 states, these maps show. Here are the symptoms and what to do if you think you ...

There have already been at least 1.9 million illnesses, 23,000 hospitalizations and just under a thousand deaths from the flu ...

"CDC's overall assessment of the immediate risk to the public's health from H5N1 bird flu, which remains low," the announcement stated, citing the Louisiana case. On Wednesday, Wisconsin officials ...