About one in 10 people who get sick from Legionnaires' disease die from the disease due to complications from illness, CDC said.

The death toll in New York’s ongoing outbreak of Legionnaires' disease in Central Harlem has risen to five, as more people continue to be diagnosed with the severe pneumonia.

MONDAY, Aug. 18, 2025 (HealthDay News) — A Legionnaires’ disease outbreak in Central Harlem has now caused four deaths and sickened 101 people, New York City health officials confirmed. The bacteria that cause the illness, called Legionella, were found in 12 cooling towers across 10 buildings, including NYC Health + Hospitals/Harlem.