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 ...

Bird flu cases are on the rise in the U.S., and the CDC is on high alert. With 66 confirmed human cases so far, officials are ...

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

Influenza cases are climbing across the United States, with the CDC reporting a 12% rise in positive flu tests during the ...

Washington ranks “high,” while Oregon outpaces entire region and ranks among highest in nation in latest CDC update.

As of December 30, the CDC has confirmed 66 human cases of the bird flu virus in the United States. Most of them were mild infections among dairy workers and others who had contact with infected ...

Newsweek has created a map showing states where respiratory syncytial virus (RSV) cases are surging.

The CDC has revealed the red flags it is monitoring for that suggest that bird flu was about to become the world's next pandemic.

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.

Outbreaks of the stomach flu are spreading across the U.S and are far higher than average for December over the past 12 years, according to CDC figures.

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

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