Health officials in northeast Tennessee have not yet determined the cause of an outbreak of hepatitis A. State Health Department official Judith Holden says her office has received thousands of calls from people who recently camped in the Cherokee Lake area after eight confirmed cases of the disease were reported in Hawkins County. Health officials gave more than 1,500 hepatitis A vaccinations last week – mostly to people Holden described as the “worried well.” Officials say only people who were in the Mooresburg community or at a nearby campground between May 15 and May 29 might have been exposed to the virus. It’s spread through feces or contaminated food or water. It can cause serious liver damage is left untreated.