Two new measles cases in King County residents bring total to 10 measles cases in Washington state residents this year

June 25, 2025.Reading time 9 minutes.

Public Health – Seattle & King County was notified of a confirmed measles case in a King County child. An adult family member of the child exhibits symptoms consistent with measles and is considered a probable measles case while we await confirmatory test results. The two individuals visited multiple locations throughout King County while infectious.

New measles case in King County resident brings total to six cases in Washington state this year

May 20, 2025.Reading time 8 minutes.

New case of measles in a King County resident with international travel. This is the sixth case of measles in Washington state residents in 2025. See blog for exposure locations.

Measles case in visitor to King County: Multiple locations of possible exposure

May 13, 2025.Reading time 10 minutes.

Public Health – Seattle & King County is informing the community of a confirmed measles case in a visitor to Washington state who may have exposed others to the measles virus at multiple locations throughout King and Snohomish counties.

Fifth case of measles in Washington state identified in a King County infant

April 22, 2025.Reading time 8 minutes.

Public Health – Seattle & King County is informing the community of a confirmed measles case in a King County resident who may have exposed others to the measles virus at Seattle-Tacoma International Airport (SEA) and at Seattle Children’s Hospital.

Potential exposure to measles from traveler at Seattle – Tacoma International Airport and nearby hotel

April 17, 2025.Reading time 7 minutes.

Public Health – Seattle & King County was notified of a confirmed measles case in a Canadian resident. The individual traveled through Seattle-Tacoma International Airport (SEA) and stayed overnight at a nearby hotel, on April 6 and 7, 2025, while infectious. The individual was likely exposed to measles while traveling abroad. The person’s vaccine status is unknown.