Pierce County, Washington. Pierce County is a county in the U.S. state of Washington. As of the 2010 Census, the population was 795,225, making it the second-most populous county in Washington behind King County. The county seat and largest city is Tacoma.
You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis). A number of viruses can cause gastroenteritis, including noroviruses and rotaviruses.
How long am I contagious if I have the stomach flu? You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis). Although you typically feel better after a day or two, you're contagious for up to three days after you've recovered. 2  Some people may be contagious for up to two weeks after recovery. 3  Rotavirus.