Travelers who flew through Newark Liberty International Airport on Christmas Eve could have been exposed to measles, the New Jersey Department of Health said Friday. The New York Post reports that a passenger who arrived at the airport from Brussels was infected with the disease, and that anyone who was in the airport between noon and 4 p.m. that day should be on the lookout for symptoms including a rash, fever, cough, and runny nose. The New Jersey Department of Health noted that symptoms could develop as late as January 14. “Anyone who has not been vaccinated or has not had measles is at risk if they are exposed,” state epidemiologist Christina Tan said in the statement. “We urge everyone to check to make sure they and their family members are up-to-date on measles/mumps/rubella (MMR) vaccine and all other age-appropriate immunizations.” The Post noted that anyone concerned that they have been infected should warn their doctor before visiting, to avoid transmitting the contagious disease to other patients.