Emergency room visits with influenza are now "very high" nationwide, the Centers for Disease Control and Prevention said Friday, in this week's update on the winter respiratory virus season.

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

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

Respiratory illness activity is currently considered "high" in the United States, according to the CDC. In one state, it is ...

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

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.

CDC reported 91 cases of norovirus, more commonly known as the stomach flu, which is over double the highest number recorded ...

The Centers for Disease Control and Prevention says flu season is on the rise with emergency room visits for influenza now “very high” nationwide. The CDC says seasonal flu cases are up nearly 20 ...

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.