SEATTLE – People who visited two locations in Issaquah and the Experience Music Project and Science Fiction Museum in Seattle on April 29 may have been exposed to the measles.

King County health officials say a Grant County girl who visited the Puget Sound area as part of a school trip that day has tested positive for the virus.

Measles has a typical incubation period of seven to 21 days. Anyone becoming ill with measles as a result of an exposure on April 29 would be expected to develop symptoms between May 5 and May 19.

People at the following locations April 29 may have been exposed:

-- 11 a.m. – 1:30 p.m., Krispy Kreme Doughnuts, 6210 East Lake Sammamish Pkwy. SE in Issaquah.

-- 12 p.m. – 4:45 p.m., Experience Music Project/Science Fiction Museum, 325 5th Ave. N., Seattle.

-- 3:45 p.m. – 6:30 p.m., McDonald's, 1305 NW Gilman Blvd., Issaquah.

A health department spokesman says the reason the times overlap is because the virus can remain in the air for some time after the person carrying it has left the area.

Last Month, three members of a Grant County family who attended a church conference in Kirkland in late March contracted the measles. Five other family members were exposed as a result. Some 2,000 people from around the world attended the conference.

Measles facts

Measles is a highly contagious virus that causes fever, rash and other complications. Measles is contagious from about four days before the rash appears through four days after the rash appears. People can spread measles before they have the characteristic measles rash, which begins on the face and spreads to the rest of the body.

Most people born before 1957 had the disease in childhood, and now many children are routinely vaccinated against it. People are immune to measles if they had the disease or were properly vaccinated, officials say. Anyone who is unsure whether they are immune is asked to contact their doctor.