City health officials are investigating two cases of Legionnaires' disease that emerged during the past 10 months at an apartment complex in Harlem.
The two cases appeared at Savoy Park Apartments, health officials said.
Both individuals have recovered, they said, stressing that the cases aren't indicative of an outbreak.
Investigators haven't determined the source of the bacteria that caused their illness.
Health officials met with Savoy Park residents Wednesday to discuss the investigation and allay any fears of an outbreak.
Management at the apartment complex notified residents of the investigation about two weeks ago and in a July 26 letter added that an environmental company has been hired to test water samples from the buildings.
The two cases are the first reported incidents since August, 2015, when city officials announced that they had largely contained an outbreak in the south Bronx that killed 10 people.
The disease had affected 108 people at the time of the announcement. Ninety-four people had been hospitalized.
The outbreaks were traced to cooling towers in south Bronx buildings.
There are no cooling towers at Savoy Park.
In most cases, people are exposed to the Legionella bacteria by inhaling contaminated aerosols from cooling towers, hot tubs, showers and faucets or drinking water.