Out-of-state traveler exposes others to measles at Washington Dulles International Airport

The Virginia Department of Health says people were recently exposed to measles at Washington Dulles International Airport.

An infected traveler went through Dulles on Jan. 24, potentially exposing people at Concourse B, people who took airport transportation to the international arrivals building and people who went to baggage claim between 5 a.m. and 9 a.m., state health officials said.

In addition, people who took an airport bus to rental car facilities between 7:30 a.m. and 9 a.m. were also potentially exposed to measles, officials said.

The Health Department did not say which state the infected person hails from or provide any other identifying information.

The case is the fourth measles case confirmed in Virginia this year; there were five such cases across the state in 2025, according to news website ALXnow.

State health officials said that measles symptoms could appear three weeks after the exposure date and that affected people were most likely to get sick through Valentine’s Day.

People who have received two doses of the measles, mumps and rubella (MMR) vaccine or who were born before 1957 are considered protected. Any potentially exposed person who is not fully immunized should contact a health care provider, officials said.

The officials also urged people to get vaccinated against measles; one dose of the MMR vaccine has a 93% efficacy rate at preventing a person from getting measles, while two doses are 97% effective, according to the Centers for Disease Control and Prevention.