An outbreak of Hepatitis A has hit the Illinois Quad City area. The Rock Island County Health Department has confirmed 19 cases of the illness in five counties. Eleven people had to be hospitalized. And, at least one local business that handles food, is taking precautions.

McDonald's on U.S. 67 in Milan was closed on Thursday. The owner told TV-6 the closure is a precautionary measure, due to a health department investigation. Theresa Foes with the Rock Island County Health Department says while all the illnesses are connected, they are not tied to one single business.

"It's not a good idea to focus on one place of business," Foes said. "There could be others that are the source of contamination for a person if everyone is not using good hygiene."

Health officials say Hepatitis A is not usually life threatening, if caught early. It is a viral infection of the liver which can only be spread by personal contact with an infected person, so hand-washing is very important. Symptoms include fever, tiredness, gastrointestinal upset and jaundice, which can result in the yellowing of the skin or eyes.

If you get it, treatment is bed rest or observation at a hospital, if the case is severe. There is also a preventative vaccine available.