COOK CO., Ill. - Health officials said a third case of measles was detected in suburban Cook County so far this year.

The Cook County Department of Public Health confirmed the case in a suburban adult whose vaccination status is unknown.

What we know:

Officials believe the person got the virus from being exposed to the last reported measles case announced on Sept. 16.

They also warned of a potential exposure for anyone who was at an Aldi grocery store located at 4820 Cal Sag Road in Crestwood on Thursday, Sept. 24, between 5 p.m. and 7:30 p.m.

Measles is a dangerous and potentially deadly disease, is highly contagious, and can remain in the air for up to two hours after the infectious person has left the area, according to health officials. A brief exposure of 15 minutes can res

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