King County Public Health officials have confirmed a measles infection in an adult international traveler who was in King County during the time that the traveler was contagious. The traveler, whose vaccination status is unknown, was most likely exposed in central Asia, where there is a current measles outbreak.


Health officials list the following Seattle locations where the infected traveler was on May 30:

If you were at any of these locations at the times listed above and are not immune to measles, the most likely time you would become sick is between June 6 and June 20.

All persons who were in the following locations around the same time as the individual with measles should:

  • Find out if they have been vaccinated for measles or have had measles previously, and
  • Call a health care provider promptly if they develop an illness with fever or illness with an unexplained rash between June 6 and June 20. To avoid possibly spreading measles to other patients, do not go to a clinic or hospital without calling first to tell them you want to be evaluated for measles.

This new measles case was most likely acquired in central Asia, where there is currently an ongoing measles outbreak. In the United States, there have been over 170 cases of confirmed measles in 2015. Most of these cases were part of a large multi-state outbreak linked to an amusement park in California.

Among Washington state residents, there have been a total of 10 confirmed measles cases in 2015. While there have been multiple public exposures to measles in King County in 2015, there have been no confirmed cases among King County residents.