The bird flu outbreak has spread to all 50 states, infecting dairy cattle, poultry farms and 61 humans across the country.

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

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

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

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

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

A person was hospitalized with a severe case of bird flu in Louisiana, according to the Centers for Disease Control and ...

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.