CHICAGO, May 7 (UPI) -- Chicago officials are scrambling for answers after a television station aired an investigative report about rodents at O'Hare International Airport.

CHICAGO, Aug. 3 (UPI) -- Officials at the Chicago Department of Public Health are trying to find out how a 47-year-old man contracted West Nile encephalitis.

CHICAGO, Jan. 3 (UPI) -- Chicago health inspectors say a local restaurant has circumvented rules banning the sale of foie gras by serving it for free.

CHICAGO, Dec. 24 (UPI) -- The Chicago departments of Public Health and Environment are trying to determine whether there is a common link in a cluster of cancer cases and other illnesses