Adults who have been in the affected area since late July with flu-like symptoms

fever, cough, or difficulty breathing should seek immediate medical attention, health officials say.

A second person has now died and more than 50 people have fallen ill as part

Adults who have been in the affected area since late July with flu-like symptoms

of a growing Legionnaires' cluster in Harlem, city health officials reported Monday.

The disease was initially detected on July 25; since then, two people have died and 58 people

have been diagnosed, the New York City Health Department revealed in its latest update.

Legionnaires', a type of pneumonia, is caused by the bacteria Legionella, which grows in warm water.

The cases from the cluster have been found in five Harlem ZIP codes: 10027, 10030, 10035, 10037 and 10039, along with the bordering communities, according to health officials.