Overview
- Cook County health officials issued the alert Tuesday, naming O'Hare Terminal 5 on March 24, Fresh Farms and Marshalls in Niles on March 26, and an Endeavor Health immediate care in Mount Prospect on March 27.
- Investigators are working with the Mount Prospect clinic to identify and notify people who were in specific areas that day.
- People who develop a fever, cough, runny nose, red eyes, or a spreading rash should call a provider first rather than walk into a clinic or ER.
- Measles spreads through the air and can linger for up to two hours after an infected person leaves a room, so even brief contact can pass the virus.
- Two MMR doses provide about 97% protection, and officials note post‑exposure vaccination within 72 hours may help prevent illness as they monitor for any secondary cases over the next three weeks.