High Alert at Chicago O’Hare Airport After Measles Exposure Sparks Emergency Response, Intensified Screening, Contact Tracing, Heightened Public Awareness, and Coordinated Health Efforts to Contain Infection, Protect Travelers, Ensure Rapid Reporting, Reinforce Vaccination, and Prevent a Potential Outbreak in One of the Nation’s Busiest International Hubs

The warning hit Chicago like a siren.
An infected traveler walked through O’Hare’s crowded Terminal 1 for hours, during peak traffic, while carrying one of the most contagious viruses on earth. Now thousands of passengers are being told they might have been exposed—without ever knowing they crossed paths. Health officials are racing to trace contacts, contain silent spread, and stop a potential outbrea…