Measles Outbreak: Another measles outbreak, this time in Washington:

Seven children from King and Snohomish counties have confirmed or probable cases of red measles and may have exposed hundreds of people in 21 public places in King and Snohomish counties.

All of the children were recently adopted from China and came to the United States with their new families on March 26.

I thought you had to show proof of immunization before entering the country, but I could be wrong.