A measles case tied to Seattle-Tacoma International Airport is the latest sign of the virus's national resurgence.
Why it matters: Health officials warn that measles — once declared eliminated in the U.S. — is making a comeback, fueled by declining vaccination rates.
Driving the news: A visitor from Arizona, unvaccinated and traveling from an outbreak area, passed through Sea-Tac on Oct. 13 before being diagnosed, according to Public Health - Seattle & King County.
Officials are urging anyone potentially exposed to check their immunity status.
Check here to find specific information about potential areas of exposure within the airport.
State of play: King County has seen four travel-related cases this year; Washington has reported 11 others, local health officials say.
The U.S. has logged nearly 1,600 measles cases in 2025 — five times last year's total, per health officials.
