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QUINCY, IL – Doctors say an “extremely contagious” stomach virus is spreading across Illinois. Symptoms of the illness include nausea, vomiting, diarrhea, and possibly a fever.

Doctors at SIU Center for Family Medicine in Quincy tell WGEM-TV that they started seeing cases of the virus a couple weeks ago. The sickness typically lasts a day or two.

FOX 2 contacted several St. Louis area hospitals. They say there is no measurable uptick in people coming in to be treated for a stomach virus. The illness appears to be in northern and central Illinois.

Dr. Bill Dixon at Southern Illinois University’s Center for Family Medicine says that it is important to drink water. Dehydration could be a real issue when coupled with the summer heat.

Doctors warn that you should wash your hands frequently to prevent spreading the virus.