Measles Cases in Oregon Exceed Last Year; Virus Detected Near Lane County

Local wastewater testing detected measles virus in Corvallis and Lewisburg, pushing the infection closer to Lane County as Oregon reports new confirmed cases and health officials urge vaccinations. Public health investigators are tracing exposures and advising anyone who may have been near known exposure sites to contact their health care provider.

Local sources said, "Measles virus was detected in wastewater in Corvallis and Lewisburg." The same reports noted, "Three cases of measles have been reported in Oregon in 2026. All of the people who contracted the disease were unvaccinated." State investigators are also focused on two cases in Linn County; those two people developed symptoms on Jan. 5 and the Oregon Health Authority released exposure locations and times for possible contacts. Health officials have advised people who might have been exposed to reach out to their providers for guidance and testing.

Numbers reported by medical centers and federal agencies give broader context. Oregon Health & Science University said, "As of Thursday, the Oregon Health Authority reported 31 cases of measles across the state, all in unvaccinated people, most of whom are children younger than 18." National surveillance shows the virus has surged: the Centers for Disease Control and Prevention reported 416 confirmed U.S. cases as of Jan. 22, 2026, following more than 2,200 cases nationwide in 2025. The CDC data also indicates 94% of recent cases were in people who were unvaccinated or had unknown vaccination status.

Measles spreads easily through the air and can be serious, particularly for young children. Health guidance explains, "Some people infected with measles can have other complications, including ear and lung infections, and diarrhea. In rare cases people can develop encephalitis, an inflammation of the brain that can cause damage." Medical experts emphasize the virus’s contagiousness: a single infected person can infect nine or 10 others nearby if they are not immunized.

Local vaccination coverage has declined in recent years. In Lane County, first-dose MMR coverage among 2-year-olds fell from 92% in 2019 to 88% in 2024, increasing the community’s vulnerability as children return to school and daycare. Benjamin Hoffman, M.D., a pediatrician and AAP leader, warned, "We know that measles is incredibly contagious and can cause serious health complications, especially in children younger than 5, so the continued rise in cases is certainly cause for concern." Oregon Health Authority leadership echoed that message and urged families to check vaccination status with their providers.

For Lane County residents, the immediate steps are practical: verify MMR records, contact a health care provider if you were at an exposure site or have symptoms, and vaccinate eligible children and adults. Public health agencies are continuing investigations; more precise case counts and exposure lists may be released as officials confirm laboratory and contact-tracing results.