(Portland, OR) -- A new measles exposure site has been identified at a southeast Portland Middle School. The Oregon Health Authority says the Centennial Middle School may have been exposed to the disease multiple times earlier this month. The potential exposure dates were said to be on April 1st and April 6th through 10th. Anyone who was in the school on those dates has been asked to contact a health care provider. Other exposure sites have been confirmed in Portland, including the Providence Portland Medical Center, a cafe in West Linn and a restaurant in downtown Gresham.