(Oregon City, OR) -- Health officials are warning Oregonians about a new measles exposure location. The Oregon Health Authority says the exposure happened at Providence Willamette Falls Medical Center's emergency department waiting room from 10 p.m. Wednesday through 12:20 Thursday morning. People who were in the waiting room during that time should check with their medical provider to make sure they're vaccinated or to watch for symptoms. Measles is highly contagious and the virus can remain in a room up to two hours after an infected person has left.