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.
1 Someone with the flu is contagious for a day or so before symptoms start, then remains contagious for 5 to 7 days once they appear. 2  The CDC considers someone to be contagious until the fever is back to normal, without the help of medication, for 24 to 48 hours.hen you have a contagious illness, like the flu or a cold, the sore throat is often accompanied by a runny nose. 1  The sore throat is sometimes caused by postnasal drip, as fluids from your sinuses drip down the back of your throat, causing redness and irritation. 2  The throat feels raw, irritated, and painful.