Measles cases continue to increase in Washington this year, including three recent cases with no known source of exposure. The Washington State Department of Health (DOH) is urging people to watch for symptoms, stay home and contact their health care provider if they feel sick, and make sure they’re up to date on their measles, mumps and rubella (MMR) vaccine.
To date, Washington state has confirmed 40 cases of measles across eight counties in the first four months of 2026. In comparison, there were 12 cases reported in all of 2025.
Three measles cases in Washington this year have no known source of transmission, including two in Kittitas County and one in Spokane County. This means that after thorough investigation, health officials were unable to determine how those individuals were exposed. This may mean measles is spreading undetected in our communities…