A measles alert was issued after an airline passenger carrying the contagious virus had passed through Chicago’s O’Hare International Airport last week, ABC News and Fox News reported.
The person passed through two terminals on Jan. 10, ABC reported.
A statement from the Illinois Department of Health said the passenger "was infectious that day."
The virus can be contracted through the air. Symptoms include a rash, high fever, cough, runny nose and watery eyes.
The passengers considered “most at risk are being contacted directly by health officials," a spokesperson for the state health agency told ABC.
Last year, 120 people from 15 states reported contracted the disease, according to the Centers for Disease Control and Prevention. The majority of people who contract the disease are unvaccinated.
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