How long are you contagious after stomach flu?

Typically, a person is contagious with the stomach flu (gastroenteritis) from 2 to 3 days before symptoms start until 3 days after symptoms go away. However, some people may be contagious for a longer or shorter period of time.

The stomach flu is spread through contact with an infected person or contaminated surfaces or objects. It can also be spread through food or water that has been contaminated with the virus.

To help prevent the spread of the stomach flu, wash your hands frequently, especially after using the bathroom and before eating. Avoid contact with people who are sick, and clean and disinfect frequently touched surfaces.