Some in the area say they were unaware of the outbreak of Legionnaires' disease, let alone the location of problem sites.

Harlem Hospital Center and a public health clinic are among the buildings with cooling towers that tested positive for Legionella, the bacteria that causes Legionnaires’ disease, during an outbreak in Harlem,

What are the symptoms of this type of pneumonia, called Legionnaires' disease, and how do you treat it? Here's what you need to know.