The state Department of Health reported that the number of people sickened at the Six Flags Great Escape Lodge and Indoor Waterpark has grown to 350 people from 200 registered Friday.

“We’ve had 352 reports of illness as of yesterday, and we do have laboratory confirmation on norovirus,” state Department of Health representative Claire Pospisil told NewsChannel 13’s media partners at The Post-Star on Monday.

Norovirus outbreaks are often linked to ill food handlers and contaminated food or water. Its symptoms include diarrhea and/or vomiting mostly. The virus is generally spread from person to person by direct contact and/or by touching contaminated surfaces or objects. Although the illness usually lasts 1 to 2 days and is not considered serious for the general population, young children, the elderly and those with chronic underlying medical conditions, such as diabetes, may develop more severe complications and should consult with their health care provider, a statement released by the state Health Department wrote.

Department of Health officials still don’t know where this norovirus came from.

“We are still looking into the cause; however, norovirus is very contagious. It may be something where we might not actually be able to pinpoint where it started,” Pospisil said.

The people who reported becoming sick stayed at the resort between March 7 and 19. Great Escape restaurants were closed following an investigation, which revealed food worker illnesses. However, drinking water and swimming pool water samples have tested negative for bacteria and showed satisfactory disinfection levels. State Health Department officials are currently interviewing ill people to identify common exposures.