LEBANON, Pa. —The Pennsylvania Department of Health is warning of a potential measles exposure at a Target in Lebanon County, according to a release issued Thursday. Video above: Headlines from WGAL News 8 Today. Officials said a person who tested positive may have exposed others at the Target on Quentin Road in Lebanon on Oct. 23 between 5 and 8 p.m. The DOH is urging anyone who visited that store during that time to check their vaccination status and monitor for symptoms. The department said unvaccinated individuals face the greatest risk of infection. According to the DOH, the person who tested positive was instructed to isolate at home while contagious. The department said it cannot provide any details about the individual due to privacy concerns. This content is imported from infogram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.Symptoms could take weeks to appearMeasles is a highly contagious virus that spreads when an infected person breathes, coughs or sneezes. The virus can remain in the air and on surfaces for up to two hours after the person leaves, according to the DOH.Symptoms typically appear seven to 21 days after exposure and include fever, cough, runny nose and red, watery eyes. The department said a rash generally follows, beginning on the head or face and spreading downward.What to do if you may have been exposedAnyone who may have been exposed and is not vaccinated should contact their health care provider or call the department at 877-PA-HEALTH (877-724-3258).People who believe they were exposed and develop symptoms are advised to contact a provider or the hotline.Health officials emphasized that vaccination offers the best protection against measles. Two doses of the measles, mumps and rubella vaccine, known as MMR, are about 97% effective at preventing the disease, according to the department. Below: Measles cases in Pennsylvania This content is imported from infogram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.