H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally ...

The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

So far this year, the CDC estimates that 5.3 million people nationwide have had the flu, and the virus has hospitalized 63,000 people, as well as contributed to 2,700 deaths, including 11 children.

The flu sent 48,661 patients to the hospital across the nation during the week ending Feb. 1, the most recent CDC data. During this flu season, there have been at least 310,000 hospitalizations.