Shoppers at a suburban Chicago Aldi store are being warned of the possibility of exposure to measles after a new case was detected in Cook County.

The Cook County Department of Public Health said it confirmed its third suburban measles case this year last week. The positive case was found in an adult with an unknown vaccination status, who is believed to have contracted the virus from another positive case last month.

Public health officials said they were working to identified and notify anyone who may have been exposed, identifying at least one point of "public exposure" -- an Aldi store in Crestwood.

Anyone who shopped between 5 p.m. and 7:30 p.m. on Sept. 24 at the grocery store located at 4820 Cal Sag Rd. was warned of potential exposure.

The previous measles case detected in Cook

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