A deadly Legionnaires' disease outbreak in New York City has set health and community leaders on a campaign to educate the public on ways to prevent the bacteria from growing and spreading.

City health officials are sounding the alarm as a Legionnaires’ disease outbreak spreads through Harlem, killing two and sickening at least 58 others. The pneumonia-like illness, first detected July 25, has been reported in zip codes 10027, 10030, 10035, 10037 and 10039, as well as in neighboring communities.

Has there ever been an outbreak of Legionnaires' disease in the Lower Hudson Valley? What to know after NYC outbreak kills two in Harlem.