Measles case identified in a King County infant

April 10, 2026.Reading time 6 minutes.

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.

Legionella: How this lesser-known bacteria in water systems can impact your health

April 2, 2026.Reading time 9 minutes.

Stainless steel showerhead spraying water downward. Blue tile in the background.

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!

Two measles cases identified in King County connected to international travel

April 1, 2026.Reading time 6 minutes.

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.

King County Executive Girmay Zahilay and Seattle Mayor Katie Wilson appoint Dr. Sandra Valenciano to lead Public Health – Seattle & King County

March 25, 2026.Reading time 4 minutes.

Portrait of Dr. Sandra Valenciano posing outdoors. She has long brown hair, glasses and is smiling.

Today, King County Executive Girmay Zahilay and Seattle Mayor Katie Wilson appointed Dr. Sandra Valenciano to serve as the Director of Public Health – Seattle & King County. Dr. Valenciano currently serves as Acting Director for the department.

World TB Day: A conversation with Public Health’s TB Officer

March 23, 2026.Reading time 12 minutes.

An X-ray of the chest of a man with tuberculosis. The areas infected with TB bacteria are colored red. Science Photo Library/Corbis

We rarely hear about someone being sick with tuberculosis (TB) – much less dying from it – here in King County. And yet, Public Health has an entire program and clinic dedicated to TB.

In light of King County Board of Health recognizing tomorrow, March 24, as World Tuberculosis Day, we sat down for a Q&A with Public Health’s Dr. Caitlin Reed, the Medical Officer for Public Health’s TB Program, so we can learn more about this local public health success story.

Measles case in traveler with possible exposures at Seattle-Tacoma International Airport

March 20, 2026.Reading time 6 minutes.

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 […]