Tis the season to wash your hands and watch what you eat. Norovirus, a vomit- and diarrhea-inducing stomach bug, is sickening Floridians through tainted surfaces and contaminated shellfish. The Sunshine State is one of 12 in the U.S. with a high number of confirmed outbreaks of the virus. Anyone suffering from a bout of the nasty, extremely contagious virus, beware: it has no specific treatment and typically has to run its course. Also of note: On average, one infected person will infect two to seven other people. “It only takes a few virus particles to cause infections, so it doesn’t take much exposure to get sick from norovirus,” said Margaret Gorensek, an infectious disease doctor at Holy Cross Health in Fort Lauderdale. Norovirus can spread through food, touch, and air particles. Earlier this week, the Food and Drug Administration issued two separate seafood recalls in states, including Florida, over potential norovirus contamination. On Monday, the FDA warned restaurants, food retailers, and consumers in seven states, including Florida, not to eat or sell oysters and Manila clams from Rudy’s Shellfish in Washington.