A second person has died and over 50 people have fallen ill in a Legionnaires' outbreak in Harlem

Health officials urge adults who have visited the affected area since late July and are experiencing flu-like symptoms, such as fever, cough, or breathing difficulties, to seek medical care immediately.

Second Death Confirmed in Expanding Legionnaires’ Outbreak in Harlem

A second person has died and more than 50 others have become ill in connection with a growing Legionnaires’ disease cluster in Harlem, city health officials confirmed Monday.

The outbreak was first identified on July 25. Since then, 58 cases have been reported and two people have died, according to the latest update from the New York City Health Department.

Legionnaires’ disease is a form of pneumonia caused by Legionella bacteria, which thrive in warm water. The current cluster of cases spans five Harlem ZIP codes—10027, 10030, 10035, 10037, and 10039—as well as nearby neighborhoods.

“If you’re in any of the affected ZIP codes, we urge you to monitor your health and see a healthcare provider immediately if you develop symptoms,” said Dr. Tony Eyssallenne, deputy chief medical officer for the NYC Health Department. “The disease is treatable with antibiotics, so early action is crucial.”

City officials report that all cooling towers in the impacted areas have been tested, and buildings with positive results were ordered to begin disinfection within 24 hours.

Health officials advise anyone who has been in the affected area since late July and is experiencing flu-like symptoms—such as fever, cough, or trouble breathing—to seek medical attention without delay.

Legionnaires’ disease does not spread from person to person. Instead, infection occurs by inhaling mist or vapor containing the Legionella bacteria. Common sources include cooling towers, whirlpool spas, hot tubs, humidifiers, and large air-conditioning systems.