Flu cases are rising across the U.S., with many people experiencing more severe symptoms than usual. Learn what the “super flu” is, how to recognize symptoms, and ways to support recovery.

If you've been catching up on health news lately, you've probably come across an intimidating new term: "quad-demic." While it might sound like something out of a sci-fi movie, it's actually a straightforward way to describe an unusual situation we're facing right now – four very contagious illnesses circulating at high levels simultaneously across the country.