Oregon measles spread

Oregon’s measles outbreak has widened beyond households, with exposures now tied to a Portland middle school, a community college and an urgent-care clinic. (opb.org) Oregon Health Authority says the state had 14 measles cases as of April 9, 2026, including 13 people who were unvaccinated or had unknown vaccination status. The state also reported one non-household outbreak spanning Clackamas and Multnomah counties on April 11. (oregon.gov) Oregon Public Broadcasting reported on April 17 that officials had identified new exposure sites this week at Centennial Middle School in Southeast Portland, a community college and an urgent-care clinic. Earlier exposure notices also included Providence Portland Medical Center’s emergency department waiting room, restaurants and a Safeway store. (opb.org) (oregon.gov) Measles spreads through the air when an infected person breathes, talks, coughs or sneezes, and the virus can remain in the air for up to two hours after that person leaves. The Centers for Disease Control and Prevention calls it highly contagious and vaccine-preventable. (oregonhealthnews.oregon.gov) (cdc.gov) That helps explain why schools and clinics draw so much attention from investigators: one infectious person can expose hundreds of people in a shared indoor space. OPB reported that hundreds of people at Centennial Middle School may have been exposed during April. (opb.org) Health officials and Oregon Health & Science University specialists told OPB that confirmed case counts likely understate the true spread because not every infected person seeks care or gets tested. Oregon’s wastewater surveillance has also detected measles virus, adding another signal that some infections may be going unnoticed. (opb.org) (cdc.gov) The Oregon outbreak is unfolding during a much larger national surge. The Centers for Disease Control and Prevention reported 1,748 confirmed U.S. measles cases as of April 16, 2026, after saying on April 2 that the total was 1,671. (cdc.gov) The United States declared measles eliminated in 2000, which means the virus no longer spreads continuously year-round inside the country. The Centers for Disease Control and Prevention says that status is threatened when imported cases reach communities with vaccination coverage below 95%, and it says elimination status will be assessed in 2026. (cdc.gov 1) (cdc.gov 2) For Oregon families, the practical advice has not changed: check measles, mumps and rubella vaccination records, watch exposure notices with exact dates and times, and call ahead before visiting a clinic if symptoms appear. The state’s case page and exposure alerts are still expanding as investigators trace where infectious people went. (cdc.gov) (oregon.gov)