CHICAGO (KMOX) - An Illinois resident with a contagious case of measles -- and who was not vaccinated -- traveled through Chicago's Midway Airport, and now officials fear a health crisis. The state says any travelers who were at Midway, perhaps catching a connecting flight, between 9 p.m. and midnight on February 22 should assume they were exposed to measles. The person also went to Northwestern University's Hospital twice in subsequent days. Illinois health officials say that while most people are vaccinated and have little risk, of most concern is the number of unvaccinated people.