The Legionnaires' disease outbreak in Central Harlem has been traced to 12 cooling towers, including several at city-owned and operated buildings like Harlem Hospital, officials said Thursday.

Harlem Hospital is one of several locations where people were exposed to Legionnaires’ disease since the outbreak in Central Harlem, officials said Thursday. The spread began in Central Harlem on July 25 with five reported cases of the disease.

New York City health officials are expected to give an update Thursday on the deadly outbreak of Legionnaires’ disease in Harlem that has killed three people and sickened nearly 100 since late July, as the latest patient counts suggest the numbers may be leveling off.