Five-thousand people are at risk of being infected with Hepatitis A after a worker at a Red Robin restaurant was discovered to have the disease.
Health officials are urging anyone who might have been exposed to get a vaccination quickly.
"If you don't give it within 14 days of the time they're exposed, it doesn't work so we are really on the clock," said Springfield Greene Co. Health Department Director Kevin Gipson. "His last day of work was the 16th, so that 14 days will be up, so you have to get it two weeks after exposure."
The health department says the worker who had Hepatitis A has been very cooperative and so has the Red Robin restaurant.
Restaurant officials say the employee won't return to work until he's medically cleared to do so.