Legionnaires' outbreak in Harlem claims a fourth life, with 99 infected and linked to contaminated water-cooling towers.

The health department offered five ZIP codes in central Harlem — 10027, 10030, 10035, 10037, 10039 – that were at the center of the cluster, as officials stressed the disease was airborne

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.