(Chicago, IL) — If you flew into or out of O’Hare International Airport last Wednesday, you may want to get to your doctor. The Illinois Department of Public Health, over the weekend, issued a warning to travelers that they may have been exposed to the measles. The state says the biggest threat came between 6:30 in the morning and 1 p.m. on January 10th. The IDPH says the biggest fear is that anyone who has not been vaccinated for the measles could be at serious risk of getting sick.