Measles

Most people who go to Disneyland come home with just mouse ears and a sunburn, but several recent visitors have also come home with the measles.  Measles was "eliminated" from the U.S. in 2000, but it's still common in foreign countries, so international travelers bring it to the U.S. with them.  People who don't have an immunity to measles from a vaccine or from having had the disease can, and do, become infected.  This site from the Centers for Disease Control and Prevention provides information about the symptoms of measles, as well as statistics, news about the recent outbreaks, and tips to help you avoid getting the disease:

http://www.cdc.gov/measles/index.html

If you do contract the measles and decide to play "connect the dots," please remember not to use a permanent marker.