https://cdnph.upi.com/ph/st/th/6061784520882/2026/upi/5f282195b9e9217de39b41bf9c877e82/v1.5/Third-person-dies-in-NYCs-Legionnaires-disease-outbreak.jpg" /> A third person has died in the Upper East Side's ongoing Legionnaires' disease outbreak, New York City health officials said amid declining cases.