New York City health officials have officially declared the recent Legionnaires' disease outbreak over after no new cases were identified during the two-week monitoring period following the last reported infection. Authorities said the absence of additional cases indicates that transmission has been successfully contained.

The outbreak resulted in seven deaths and 84 hospitalizations. Investigators linked the infections to Legionella bacteria found in cooling towers at multiple buildings across the city. More than 180 cooling towers were inspected, and 83 buildings tested positive for the bacteria. Property owners completed required cleaning, disinfection, and maintenance measures to eliminate the contamination.

Legionnaires' disease is not spread from person to person. Infection occurs when people inhale tiny water droplets contaminated with Legionella bacteria. Although many exposed individuals never become ill, older adults, smokers, people who vape, and those with weakened immune systems or chronic medical conditions face a greater risk of developing severe illness.

Health officials emphasized that early diagnosis and antibiotic treatment can significantly improve outcomes. The city will continue monitoring cooling systems and water infrastructure to reduce future risks and strengthen public health protection.