Here is what you need to know about the flu, the norovirus stomach bug, RSV and COVID. Influenza, or the flu, is a contagious respiratory virus. It can be a severe illness that affects the nose ...
Norovirus is a contagious stomach bug that the CDC says causes vomiting and diarrhea. The sickness lasts for one to three days, but people can still spread the virus a few days after becoming ill.