Legionnaires' disease is a type of pneumonia caused by bacteria that grows in warm water. It has infected dozens of people in a growing cluster of disease in New York.

Fifty-eight people have been infected—and two have died—in a New York City outbreak of Legionnaires’ disease—a severe type of pneumonia caused by a bacterium commonly associated with air-conditioning

New York City Department of Health inspectors are fanning out across Central Harlem to inspect cooling towers amid a deadly outbreak of Legionnaires' disease. So far there have been 73 cases identified since July 25.