Public health officials say that as many as 5,000 people may have been exposed to hepatitis A after a worker at a Red Robin restaurant in Springfield, Missouri tested positive for the virus. Customers served from May 8 to May 16 are at a potential risk. State and federal officials say their goal is to get those customers vaccinated against the virus before the 14-day-window for the shot to be effective closes. This isn’t Red Robin’s first run-in with hepatitis A. Earlier this month, an employee in one of its Pennsylvania restaurants was also diagnosed with the virus, but officials there did not deem it a public health risk.