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Three Measles Cases Confirmed in Montgomery County, Health Officials Say
Health officials said the three unvaccinated family members were exposed by an infected traveler, and two vaccine doses are about 97% effective, the Centers for Disease Control and Prevention said.
On Tuesday, the Montgomery County Health Department announced three unvaccinated residents from the same family contracted measles, marking the first cases reported in the Houston area this year.
Health officials confirmed the family members were exposed by an infected person who traveled from out of state. Measles spreads through the air when an infected person coughs or sneezes, remaining in the environment for up to 2 hours.
The Maryland Department of Health announced two measles cases in Southern Maryland on Wednesday. Both residents recently traveled to a U.S. location experiencing an active outbreak, bringing the state's total for 2026 to 11.
St. Mary's County officials identified potential exposure sites, including J&R Feeds LLC and MedStar St. Mary's Hospital, between July 16 and July 21. Visitors should monitor for symptoms for 21 days following potential contact.
Nationally, the U.S. has recorded more than 2,200 measles infections this year, according to Johns Hopkins University tracking. Two doses of the MMR vaccine are about 97% effective at preventing measles, the CDC reports.