Montgomery County health officials are sounding the alarm after reports were confirmed that a Virginia resident with measles visited a Bethesda building on Feb. 10 and could have exposed others to the condition.

The infected person was in a building at 7200 Wisconsin Ave. in Bethesda on Tuesday, Feb. 10, between 9 a.m. and 7 p.m., according to a press release issued by the county health department Friday. Anyone who visited this building during that time period may have been exposed to measles.

The 7200 Wisconsin Ave. building houses multiple offices and retail spaces, including an Industrious co-working space, Starbucks and World of Beer. County health officials did not specify which parts of the building the infected person visited.

County health officials said that anyone who visited the building during the possible exposure period, especially those who are not vaccinated against measles, should monitor themselves for early measles symptoms, especially fever. Symptoms could take as many as 21 days to develop following exposure.

Anyone who develops a fever or other measles symptoms should contact their health care provider, health officials said.

Maryland health officials earlier this year were investigating potential measles exposures after a person with a confirmed case traveled through the region on an Amtrak train on Jan. 7. The individual traveled from Philadelphia to Washington, D.C., and may have exposed others to the highly contagious virus, which can spread through the air when an infected person breathes, coughs or sneezes.

According to the Maryland Department of Health, possible exposure locations in Maryland include an Amtrak Northeast Regional train between Philadelphia’s 30th Street Station and Washington’s Union Station between 9 p.m. and 11:30 p.m. on Jan. 7, as well as shuttle buses serving Baltimore-Washington International Thurgood Marshall Airport late that night and into early Jan. 8. Officials emphasized that no exposures were identified inside the airport terminals themselves.

There were at least 2,144 cases of measles in the U.S. in 2025, with 93% of the people being unvaccinated, according to the Centers for Disease Control and Prevention.

At least three cases of measles were identified in Maryland in 2025, according to health officials. One of them was in Howard County after a resident traveled abroad, and two cases were in Prince George’s County, also after international travel.