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Harlem Legionnaires’ Outbreak Reaches 101 Cases as Cooling-Tower Remediation Nears Completion

Contamination control measures have been credited with a fall in new infections; authorities ramp up genetic analyses; regulators draft tougher tower-inspection rules.

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Legionnaires' disease, which is not directly contagious from person to person, is caused by bacteria that can multiply in water and air conditioning systems
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Overview

  • The New York City Health Department reports 101 confirmed Legionnaires’ cases in Central Harlem, including four deaths and about 15 current hospitalizations.
  • Investigators identified Legionella bacteria in 12 rooftop cooling towers across five ZIP codes, with 11 towers already disinfected and the final unit slated for immediate treatment.
  • New infections have begun to decline following emergency remediation orders, and health officials assure residents that municipal water and building plumbing remain safe for everyday use.
  • City laboratory teams are conducting culture and genetic testing to link patient isolates to specific towers and confirm environmental sources of the outbreak.
  • Lawmakers and regulators are moving to impose stricter inspection schedules, shorter remediation deadlines, and higher penalties on building owners to prevent similar future clusters.