Source: koto_feja / GettyMaryland health officials have confirmed a new measles case involving a resident who may have exposed others on the upper Eastern Shore. The Maryland Department of Health announced the case Tuesday but did not release details about the infected person, citing privacy concerns. Measles is a highly contagious virus that spreads through the air when an infected person breathes, coughs or sneezes. Health officials are urging anyone who may have been exposed to monitor for symptoms for 21 days. Anyone who is not fully vaccinated should contact a healthcare provider or local health department to discuss possible post-exposure treatment.