The Centers for Disease Control and Prevention is monitoring cases of measles in 21 states, including Maryland, after noting an outbreak. In all of 2017, for example, 118 people from 15 states and DC had measles. In 2015, 188 people contracted measles.
While the state does require children that enroll in child care facilities and public schools to have their measles vaccination, but children can be exempted either for a medical or religious reason. The outbreak likely started from a traveler who became infected overseas with measles, then visited the amusement park while infectious; however, no source was identified.
In 2014, the United States experienced a record number of measles cases, with 667 cases from 27 states reported to the CDC.
Measles is a respiratory disease caused by a virus. Numerous cases in the U.S.in 2014 were associated with cases brought in from the Philippines, which experienced a large measles outbreak.
Symptoms develop between six and 19 days after infection, and include a runny nose, cough, sore eyes, a fever and a rash. A red or reddish-brown rash also appears, first on the face at the hairline and spreading down to the entire body.