The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the ...

But it’s not all bad news about bird flu. In 3 Brilliant Minutes, Brad Spakowitz talks about progress on a universal bird flu vaccine. Much of this research comes from the National Institutes of ...

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals. But not all influenza is the same. There are some notable differences between flu A and flu B strains.