No doubt, you have heard about the outbreak of norovirus in the Mammoth area of Yellowstone National Park last week, thought to have been introduced to the area by visitors on a couple of tour busses. As contagious as the virus is, it is very easy for it to find its way to areas surrounding the park. Teton County Public Health Response Coordinator Tammy Marshall says your best defense is the same advice given during flu season: wash your hands frequently and keep them away from your face. Even though the virus appears to be on the decline in Yellowstone, Marshall there are steps those in this area should take to limit their chances of spreading the unpleasant affliction. She urges people to stay home if they feel ill – especially if they work in a food service – since the disease is very contagious. Norovirus infection is characterized by nausea, forceful vomiting, diarrhea, and abdominal pain, and in some cases, loss of taste. General lethargy, weakness, muscle aches, headache, coughs, and low-grade fever may also occur. Marshall says the virus usually goes away on its own after 24 to 48 hours. So far, she says, it has not made a significant appearance in the valley.