Major US airport on red alert as passenger is diagnosed with world’s most infectious disease

Health officials have issued a warning about possible measles exposure at Chicago O’Hare International Airport. The concern centers on an infected adult who spent significant time in Terminal 1, raising fears that hundreds of travelers may have been exposed to the highly contagious virus.

The individual was at O’Hare — the world’s fourth busiest airport — on April 22 and 23, between 10 a.m. and 8 p.m. each day. Despite having received one prior dose of the MMR vaccine, they developed a rash on April 25. Subsequent tests confirmed a measles infection.

Following the diagnosis, the patient began isolating at home to prevent further spread. Their case has prompted increased monitoring at the airport and surrounding communities.

A second measles case was reported just days later in another adult from the same Illinois county. The person’s vaccination status is unclear, but they sought treatment at a local hospital on April 28.

Medical staff acted quickly, isolating the second patient upon arrival to reduce the risk of transmission within the facility. Both cases have raised concerns among health officials about potential community spread.

Authorities are urging anyone who may have been at O’Hare’s Terminal 1 during the identified dates and times to contact their healthcare provider. Travelers are advised to watch for symptoms such as fever, cough, and rash.

This incident is the latest in a series of measles scares affecting major U.S. airports and nearby neighborhoods, highlighting the importance of vaccination and rapid public health response.