(Gresham, OR) -- Health officials are confirming a new measles exposure incident in the Portland area. The Oregon Health Authority says the exposure happened at the WinCo store on Southeast 1st Street in Gresham Saturday March 7th. The infected person was in the store around 2 p.m. and customers could have been exposed to the virus through 5 p.m. If you were at the store during that time, check with your health care provider to determine whether you're immunized or need to watch for symptoms.