A Kitsap County man has been diagnosed with measles, bringing the total number of people in Washington with confirmed cases of the highly contagious disease to 12, according to the Washington State Department of Health. A list of possible sites and times of exposure is at 1.usa.gov/1kfFSV0.

The Kitsap County resident, a man in his 40s, traveled around Puget Sound last week during the time he was contagious, the department said. He went to Seattle from Bainbridge Island on the “Tacoma” ferry on April 4, then flew to Friday Harbor. From the Friday Harbor marina, he went to the San Juan County Department of Community Development and Planning and the Friday Harbor fuel dock.

The man may have been exposed to measles March 21 at Cask and Schooner Public House and Restaurant on Friday Harbor when the person who developed the first of five cases of measles in San Juan County was present while contagious.

There have been no reported measles cases related to a Whatcom County woman who visited several Seattle locations in late March, but public-health officials warn that it’s about time anybody who was exposed in those places to begin showing symptoms. The woman attended a Kings of Leon concert and went to Pike Place Market while contagious.

Most people in Washington are immune to measles, so the public risk is low except for those who are unvaccinated, the health department said. However, measles is highly contagious; a person who isn’t vaccinated can contract the virus just by walking into a room where someone with the disease has been in the past few hours. In some cases, measles can be fatal, according to the Centers for Disease Control and Prevention.

Anyone who is not vaccinated or unsure about their immunity and develops an illness with fever and rash should contact a health-care professional immediately.

Measles symptoms begin seven to 21 days after exposure and the person with measles is contagious for about four days before and after a rash appears, according to the health department.

Paige Cornwell: 206-464-2530 or pcornwell@seattletimes.com