Public Health – Seattle & King County was notified of a confirmed measles case in a Canadian resident who traveled through Seattle-Tacoma International Airport (SEA) on January 22, 2026. The individual’s vaccination status is unknown. If you are not immune to measles or don’t know your vaccination status, and were at the airport on January 22nd, please visit our measles webpage for specific information about potential areas of exposure within the airport.
The infected person was at Seattle-Tacoma International Airport before being diagnosed with measles and is no longer in King County. People infected with measles can spread the disease before they know they are infected and before any rash appears.
“We are at a pivotal moment with more measles outbreaks happening throughout the U.S. and abroad. As a result, we may see more cases in King County. But getting vaccinated is a key step in preventing measles from spreading in our community,” said Dr. Sandra J. Valenciano, Health Officer for Public Health – Seattle & King County…