Second measles case identified in Washington state

March 18, 2025.Reading time 5 minutes.

We have identified a second case of measles in Washington state. This case is linked to a previous case of measles in King County from late February. The individual was not in any public spaces while infectious.

First measles case of 2025 in Washington state identified in a King County infant

February 27, 2025.Reading time 9 minutes.

We have identified a new case of measles in an infant in King County. People who were at certain locations in King County may have been exposed. People who are vaccinated are very well protected. See full blog for a list of exposure locations:

Public Health monitoring measles exposure among international travelers visiting Seattle

April 17, 2024.Reading time 7 minutes.

Public Health was informed by Washington State Department of Health last week that a group of international travelers visiting Seattle were exposed to an individual with measles prior to arriving in Seattle. Currently, there are no cases of measles among the group (or within King County), but we are monitoring the situation closely.

Unraveling the myth of MMR and autism

September 9, 2019.Reading time 2 minutes.

More than eight months into the nation’s largest measles outbreak in decades, there’s a lot of misinformation circulating about the measles, mumps, and rubella vaccine (MMR). To help you figure out what’s fact and what’s fiction, we put together simple answers to some common questions about MMR. Download the complete, printable infographic here. For more […]

New King County measles case

May 17, 2019.Reading time 7 minutes.

NOTE: All exposure locations in King County, including those from previous cases, are updated at kingcounty.gov/measles/cases. Public Health – Seattle & King County is investigating a new measles case with possible exposures in King County. The King County resident, a woman in her 40s, spent time at sites in King County before she knew she […]

Emerging mumps outbreak in King County

January 10, 2017.Reading time 7 minutes.

UPDATE (1/13/17) Current mumps case counts in King County are now available on Public Health’s website. The case counts are updated on weekdays after 3 pm (except on government holidays). Mumps cases for the entire state are reported on the Washington State Department of Health’s website. HIGHLIGHTS FROM PREVIOUS UPDATES: For more information about why vaccinated […]