OHA release - Health officials recommend those who were at the location during this time and date to consider vaccination if not immune.  PORTLAND, Ore.—Oregon Health Authority (OHA) and Multnomah County health officials are warning the public about a location where people may have been exposed to measles.  People might have been exposed if they were at the following location at this date and time:  Legacy Mount Hood Medical Center emergency room waiting room, 24800 SE Stark St., Gresham, between 9:18 a.m. and 11:24 a.m., Saturday, August 8.  People who were at this location during this date and time should check their vaccination records and monitor for signs and symptoms of measles. People born after 1957 who have not had measles and have not been vaccinated against measles should receive an MMR vaccine as soon as possible.  Families without a primary care provider can establish care at any of Multnomah County's seven primary care clinics or nine student health centers (based at high schools but open to anyone ages 5-18) by calling 503-988-5558 to make a new patient appointment. Clackamas County residents can schedule an appointment with a Clackamas County Health Center.