Some call it the stomach flu or a stomach bug, but in reality, Norovirus is not the flu at all.

Nearly half a million Americans visit the emergency room (ER) each year with a fast-spreading stomach bug called norovirus. While anybody can be infected, young children and seniors are at risk of ...

Dozens of hikers have symptoms of norovirus, including vomiting and diarrhea, and it's spreading elsewhere in the U.S. Why the so-called stomach flu is so contagious — and how you can prevent getting ...