BOSTON (CBS) – The Massachusetts Department of Public Health is looking into a suspected case of hepatitis A in a food service worker at a Tasty Burger in Boston.

A Tasty Burger spokesperson told WBZ-TV it’s an “isolated incident with one employee” at their Nashua Street restaurant at North Station. Tasty Burger has three restaurants in Boston and one in Cambridge.

“We are currently following the recommendations of the Boston Public Health Commission in an event like this. Per their advice, we are taking the proper precautions and steps. All Tasty Burger locations are open,” the company said in a statement Friday.

The Tasty Burger Nashua Street restaurant at North Station. (Photo credit: Tom Matteo – WBZ-TV)

DPH said the risk to the public is “very low.”

“At this point we don’t feel there are major issues, a very low risk of issues,” said William Christopher, Commissioner of Boston Inspectional Services. “Public Health will continue working with the staff.”

Christopher said they did an inspection and would have immediately closed the restaurant if they had concerns. “At this point it’s business as usual,” Christopher said.

Read: Hepatitis A Questions and Answers

Some customers said they were concerned about eating at the restaurant. “Just the health risk and the uncertainty of not knowing,” one customer said. “When you hear something like that you play it safe I guess.”

Hepatitis A is a highly contagious liver infection. According to the Centers for Disease Control and Prevention, it is usually transmitted “person-to-person through the fecal-oral route or consumption of contaminated food or water.”

Symptoms include fatigue, low appetite, stomach pain, nausea, and jaundice. The CDC says those issues usually resolve within two months of infection.