CHESTERFIELD COUNTY, Va. (WRIC) -- The Virginia Department of Health (VDH) is alerting residents of potential measles exposure after confirming two new cases in Northern Virginia. These cases are separate from the previously reported measles case at Dulles International Airport earlier this month. The two newly confirmed cases involve residents of Prince George’s County, Maryland, who traveled together and passed through two major Virginia airports -- Dulles International and Ronald Reagan Washington National. The VDH has identified specific locations and time frames where potential exposure may have occurred: Dulles International Airport (IAD) on Wednesday, March 5: Concourse A, on transportation to the International Arrivals Building (IAB) and in the baggage claim area between 8 a.m. and 12:30 p.m. Concourse A, on transportation to the main terminal and in the baggage claim area between 4 p.m. and 9 p.m. (Previously reported March 9 and unrelated to this new exposure.) Ronald Reagan National Airport (DCA) on Friday, March 14: Terminal Shuttle Bus between 12 p.m. and 2:30 p.m. Washington Area Metro on Friday, March 14: Yellow Line Train from Ronald Reagan Washington National Airport station transferring at the L’Enfant Plaza station to the Silver Line Train heading towards the Downtown Largo station between 12:15 p.m. and 3:15 p.m. Dr. Elaine Perry, Director of the Richmond and Henrico Health Districts, emphasized that vaccination is the best form of prevention. “Because measles no longer sort of naturally or routinely circulates in the United States, fortunately, when we do see measles being introduced to the country, it is through people traveling,” she explained. According to the CDC, Measles virus is airborne and highly contagious if the infected person breathes, sneezes or coughs. "If (you) are going to be undergoing international travel ... make sure that you and the people that you're traveling with, including children, are up to date on their measles, mumps, rubella vaccine because, as always, vaccination is the best way of prevention," Perry said. Measles symptoms typically begin 7-14 days after exposure, starting with a fever exceeding 101 degrees and red, watery eyes. Three to five days later, a rash develops, usually appearing on the face first and then spreading throughout the body. Click here if you were at the above locations on the day and time specified. Contact your doctor if you have any questions relating to vaccination status. ...read more read less