(Harrisburg) -- The state Health Department is urging people who may have come into contact with a tourist in Lancaster County who's been diagnosed with measles to visit their doctors. Department spokeswoman Christine Cronkwright says an international traveler who was infected with the disease stopped in Philadelphia last week before visiting several tourist attractions in the midstate. They included the Amish Experience at Plain and Fancy Farm, Glick's Roadside Stand, and Riehl's Quilt Shop. Cronkwright says certain groups of people are at-risk of catching the disease. "Infants who are less than one year of age [are at risk] because they would be too young to have received the MMR vaccine, or the measles, mumps, and rubella vaccine, as we call it," she says. "There are also some people who may have been vaccinated with an inactivated vaccine between 1963 and 1967." Symptoms include fever, dry cough, runny nose, sore throat and a raised, red rash. Cronkwright says symptoms may not develop until the first full week of September, so those who believe they may have been infected should contact their health care providers or the state Health Department.