Health officials in Seattle and King County have confirmed a new case of measles in an infant, marking the 34th case in Washington state so far in 2026. The child, who had not yet been vaccinated, reportedly contracted the virus during recent international travel and visited several public locations while infectious.
Key details of the exposure:
- Risk Locations: Between April 3 and April 8, 2026, the infant was present at several high-traffic locations, including a Safeway in Bellevue, the Supreme Dumplings restaurant, and the Seattle Children’s Hospital emergency department lobby.
- Public Transit: The child also traveled on Metro Bus Route 250 and the Link Light Rail 2 Line during the infectious period.
- The “Window of Sickness”: Public Health officials warn that anyone exposed at these locations who is not immune would likely begin showing symptoms between April 10 and April 29, 2026.
- Contagion Timeline: Measles is highly contagious and can spread through the air up to four days before the characteristic rash even appears. Nine out of ten unprotected people who are exposed to the virus will become infected.
Advice for the Public:
Dr. Sandra J. Valenciano, the county’s health officer, is urging residents to verify their vaccination status immediately. While the risk to the general public remains low due to high local vaccination rates, those who were at the exposure sites should monitor themselves for fever or unexplained rashes.
Authorities emphasize that anyone suspecting they have measles should call their doctor before showing up at a clinic to avoid spreading the virus to other patients. For families planning summer travel, health officials recommend that infants as young as six months receive an early “travel dose” of the MMR vaccine if heading to areas with active outbreaks.
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