A infected traveler was on the Amtrak Northeast Regional Train from Philadelphia to Washington, D.C. on Jan. 7.

Measles, which spreads through the air when infected people cough, sneeze, or talk, can linger in the air for up to two hours ...

Health officials are warning that there may have been a possible measles exposure at Philadelphia International Airport, 30th ...

Vaccination is highly effective at preventing infection, but immunization rates have been falling in the United States since ...

Officials warned of a possible measles exposure at Philadelphia International Airport, 30th Street Station and an Amtrak ...

The Philadelphia Health Department is warning of possible measles exposure at two of the city's most popular transportation ...