Updated

The Illinois Department of Health has issued a warning for anyone that was in Chicago O’Hare Airport on Wednesday, January 10 after a passenger tested positive for measles.

The Department of Health confirmed that an unidentified passenger that flew into the airport from another country had tested positive for the disease.

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The traveler landed at Chicago O’Hare and was in multiple terminals of the airport before boarding a second flight from Chicago to Little Rock, AR, WTVG reports.

According to WGNTV, the passenger was in Terminal 1 and 5 during the day.

The Department of Health is warning other passengers that were in the airport between 6:30 a.m. – 1 p.m. on January 10, that they may have been exposed to measles. The Department of Public Health has asked anyone who was at the airport during that time to get checked.

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Measles can cause a fever, red itchy eyes and a rash. The disease is highly contagious and can take up to ten days for symptoms to appear.

Those with the MMR vaccine should be protected from contracting the disease.