Norovirus, also called stomach flu or 24-hour bug, is a highly contagious virus that can cause severe diarrhea and vomiting. There are 20 million cases of norovirus each year in the US and it is ...

Norovirus is a virus that causes vomiting and diarrhea. While it's commonly called the stomach flu or stomach bug, norovirus is not related to the flu, which is caused by the influenza virus.

Norovirus, the stomach bug that can cause nausea, vomiting, and diarrhea, is surging throughout the U.S., and cases are rising in Texas as well. The highly contagious contagious virus can spread ...