King County confirms measles case in infant; exposure risk in Bellevue and Seattle low

April 11, 2026 - 11:01

Public health officials have confirmed a case of measles in an infant, issuing a warning for potential exposures at several locations in Bellevue, northeast Seattle, and on public transit. The infant was too young to be vaccinated. The overall risk to the general public is currently assessed as low, but officials are urging vigilance.

Potential exposure locations include a children's clinic in Bellevue and a hospital emergency department in northeast Seattle. Specific dates and times have been released by health authorities. Individuals who were at these locations during the identified windows should check their vaccination status and monitor for symptoms.

Measles is a highly contagious viral illness that spreads through the air. Initial symptoms include high fever, cough, runny nose, and red, watery eyes, followed by a characteristic rash a few days later. The disease can be serious, especially for young children, pregnant individuals, and those with compromised immune systems.

Health officials emphasize that vaccination is the best protection. The measles, mumps, and rubella (MMR) vaccine is highly effective and safe. Two doses are approximately 97% effective at preventing measles. Anyone unsure of their vaccination history should contact their healthcare provider. People who develop symptoms should call ahead before visiting a clinic or hospital to prevent further spread.