Announcement of the latest death comes just hours after city officials identified 12 cooling towers in 10 Harlem buildings that tested positive for Legionnaires' disease.
Public health officials are investigating two cases of Legionnaires' disease possibly contracted at a senior home in southwest suburban Plainfield.
The Illinois Department of Public Health and the DuPage County Health Department are investigating three cases of Legionnaires' disease in former patients of Northwestern Medicine Central DuPage Hospital in Winfield.
A family is suing Northwestern Memorial Hospital over the death of a Texas woman who they say contracted Legionnaires' disease from another patient at the Chicago medical center.
Classes are set to resume Monday at two schools in Chesterton, Indiana after concerns about Legionnaire's disease.
Two schools in Chesterton, Indiana were closed Friday after traces of Legionella bacteria were discovered at the schools.