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 contagious is the flu? You may be contagious one day before developing flu symptoms and five to seven days after symptoms present. This period of time can be extended for kids or people with weakened immune systems. Tips to defend yourself against influenza: Get the flu shot before the end of October; Practice good hand hygiene; Exercise!