The disease is a type of pneumonia caused by the bacteria Legionella, which grow in warm water and can spread in building water systems such as showerheads.

A recent cluster of Legionnaires’ disease cases in New York City has once again raised alarms in Georgia about this rare illness, recalling the state’s outbreak in 2019. The New York Times reported the Harlem outbreak is linked to contaminated cooling towers in 11 buildings and 70 people have been diagnosed with three deaths reported so far.

A Legionnaires' disease cluster in the Harlem area of New York City has caused three deaths and over 80 people to be sickened. Here's what it is, symptoms and how it's spread.