New York City is dealing with a Legionnaires’ disease outbreak that has reportedly killed five people and sickened 82 others, according to reporting from multiple outlets. Public health and medical experts say the risk is linked to exposure to Legionella bacteria, which can grow in water systems such as air-conditioning units, building plumbing, and other water sources when conditions allow it to multiply. Experts emphasize that prevention focuses on limiting opportunities for the bacteria to spread and preventing contamination in building water systems. Recommended steps include properly maintaining and cleaning cooling towers and air-conditioning equipment, following established disinfection and water-treatment practices, and ensuring hot water and cold water are kept within appropriate temperature ranges to reduce bacterial growth. Experts also advise that building owners and facility managers monitor and address water system problems, reduce aerosol-generating activities when feasible, and follow guidance from public health authorities on testing and remediation. The reporting reflects ongoing efforts to investigate the outbreak and reduce further cases through targeted prevention measures in affected areas and facilities.