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Oregon Confirms New Measles Case in Clackamas County but No Exposure Sites Identified Yet News By Diane Megaw On Jan 17, 2026 Measles Virus Particle The Oregon Health Authority (OHA) confirmed yesterday that a new measles case had been identified in Clackamas County. The person was unvaccinated, and OHA urged Oregonians to ensure they are protected against measles through immunization. Tidings Data Snapshot Measles Activity in Oregon 2026 3 Confirmed Oregon cases reported so far in 2026 2 Counties with confirmed cases : Linn and Clackamas 2 Public exposure locations listed for the Linn County cases 0 Public exposure locations listed so far for the Clackamas County case Jan 5 Symptom onset date reported for the two Linn County cases Source: Oregon Health Authority news releases dated Jan 12 2026 and Jan 16 2026 Dailytidings.com Measles In Clackamas County OHA did not identify the gender, age, or other personal details of the person identified with measles. OHA and Clackamas County health officials are investigating whether the person traveled outside Oregon or whether the case is linked to other measles cases, including the two Linn County measles cases reported on Jan. 10 . Both patients were unvaccinated and had no known travel outside Oregon. While there are currently no known public exposure locations associated with the Clackamas County case, state and local officials are working to identify others who may have been exposed to help ensure they are adequately protected against measles. Howard Chiou, M.D., Ph.D., medical director for communicable diseases and immunizations at OHA’s Public Health Division, confirmed that vaccination against measles is the best way to protect yourself and your family from measles. He said, “Measles is more than a rash and fever.” Measles can be dangerous, especially among infants and children younger than 5, older adults, pregnant people, and people with weakened immune systems. Dr. Chiou confirmed that measles can suppress the immune system and increase the risk of severe disease from other infections. He suggested that everyone talk with their health care providers to ensure they are up to date on vaccinations. Infectious window People can spread measles up to 4 days before rash begins and 4 days after rash begins Virus lingering Virus can remain in the air or on surfaces up to 2 hours after an infected person leaves Symptoms start Symptoms can begin 7 to 21 days after exposure MMR protection 1 dose about 93% effective against measles / 2 doses about 97% effective Fatal risk In developed countries in recent years, about 1 to 2 deaths per 1,000 cases For more information about measles, click here . Clackamas County Share Twitter Facebook ReddIt WhatsApp Pinterest Email