Legionnaires' disease is a type of pneumonia caused by bacteria that grows in warm water. It has infected 67 people in a growing cluster of disease in New York.

Three people have died and more than 60 others are sickened in a growing Legionnaires' disease cluster in New York City, according to officials. The cluster, which began July 25, has led to 67 Legionnaires' disease diagnoses in Central Harlem as of Aug.

A Legionnaires' disease cluster in the Harlem area of New York City has caused three deaths and 5over 60 people to be sickened. Here's what it is, symptoms and how it's spread.