State public health officials say they've identified a cluster of Legionnaires' disease in Chicago and another in nearby Lake and McHenry counties.
The Illinois Department of Public Health in a news release says it is investigating possible sources of the Legionnaires' disease but says the clusters aren't connected.
The department says the Chicago cluster involves two residents of the Warren Bar South Loop nursing home. It says that the possible exposure point of the second cluster was a Walmart store in Johnsburg.
The department says both the nursing home and the Walmart have taken action.
Legionnaires' is water-borne malady. The state is now investigating a three-year-old Legionnaires' disease crisis at a state-run veteran's home in Quincy that contributed to the deaths of 14 and sickened dozens more.