The Los Angeles County Department of Public Health is investigating a case of Hepatitis A at a Buffalo Wild Wings in Monterey Park, telling customers who visited the restaurant on certain days this month to get the vaccine or get tested.

An employee at a Los Angeles-area Buffalo Wild Wings restaurant was infected with hepatitis A, meaning patrons have possibly been exposed to the highly contagious disease. The infection was reported at the Monterey Park location at 4000 Market Place,

The Los Angeles County Department of Public Health issued a warning Tuesday to Monterey Park residents after a Buffalo Wild Wings worker contracted hepatitis A.