Norovirus is a very contagious virus that causes vomiting and diarrhea. It is sometimes called the "stomach flu" or the "stomach bug." However, norovirus illness is not related to the flu.

But this time of year, another virus typically increases in spread, and causes more unpleasant, if short-term, symptoms. Here's what you need to know about norovirus, or the stomach flu. According to ...

stomach pain and diarrhea, common symptoms include nausea, body aches, headache and fever. Most norovirus outbreaks occur when people who are already infected spread the virus to others by direct ...