Public Health – Seattle & King County has confirmed a case of measles in a visiting Canadian resident who traveled through King and Snohomish counties while contagious from April 30 to May 3, 2025. The individual’s vaccination status is unknown.
The visitor, who has since been diagnosed with measles, was in several public locations including Seattle-Tacoma International Airport, LA Fitness, Uwajimaya, Chateau Ste. Michelle Winery, and other venues in Renton, Bellevue, Seattle, Everett, and Woodinville. A full list of locations and times can be found below.
Measles is a highly contagious virus that can linger in the air for up to two hours after an infected person leaves. People who were at the identified locations during the listed times may have been exposed. Symptoms can appear 7 to 21 days after exposure and include fever, cough, runny nose, red eyes, and rash.
(Image courtesy Public Health – Seattle & King County)
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“With more than 1,000 cases reported nationwide so far this year, 2025 is on track to be the worst year for measles in the U.S. since the early 1990s,” said Dr. Meagan Kay, Medical Epidemiologist for Public Health – Seattle & King County. “Now is the time to check your vaccination status.”
Most people in the region are protected thanks to the measles, mumps, and rubella (MMR) vaccine. Two doses offer about 97% lifetime protection. However, those who are unvaccinated or uncertain of their immunity — especially infants, older adults, pregnant people, and those with weakened immune systems — should be extra cautious and consult their healthcare provider if exposed.
For more information, including where to get vaccinated and what to do if you think you were exposed, visit: www.kingcounty.gov/measles.
