As of Thursday evening, there had been three deaths, which was the same number as the day before. However, the city’s Health Department said there were now 81 confirmed cases, up from 73 the day before.

Adults who have been in the affected area since late July with flu-like symptoms, fever, cough or difficulty breathing should seek immediate medical attention, health officials say.

A Legionnaires' disease cluster in the Harlem area of New York City has caused three deaths and over 80 people to be sickened. Here's what it is, symptoms and how it's spread.