Public Health – Seattle & King County was notified on 5/14/26 of an additional King County resident that was on the same plane as an ill passenger from the MV Hondius cruise ship announced on Tuesday, 5/12/26. The King County resident is considered at low risk for infection because they were not seated near the ill passenger. This resident is asymptomatic and monitoring for symptoms.
Public Health – Seattle & King County has been notified about three King County residents who were potentially exposed to hantavirus linked to the MV Hondius cruise ship. All three are asymptomatic and monitoring for symptoms, in coordination with public health officials. There are no cases of hantavirus in King County at this time.
Public Health – Seattle & King County is informing the community of a confirmed measles case in a King County infant who may have exposed others to the measles virus.
In 2025, there were 33 cases of Legionella infections among King County residents compared to 8 cases in 2005. But there is good news: Legionnaires’ disease is preventable!
Public Health – Seattle & King County was notified on March 30, 2026, of measles cases in two adults who live in King County. The two individuals traveled together internationally where they were likely exposed to measles. Before they were diagnosed with measles, the two individuals visited multiple locations in Seattle, Kirkland and Bellevue while infectious.
Leer en español 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 March 9, 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 March 9, please visit our measles webpage for specific information about potential areas […]
