Flu season is starting to tick up in the U.S. And, looking at clues from other countries, we may be in for a rough winter. But not all influenza is the same. And there are some notable differences ...

Add Yahoo as a preferred source to see more of our stories on Google. This flu season has been harsh. As of Dec. 27, there have been 11 million reported cases, 120,000 hospitalizations, and 5,000 ...

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. On ...