HARLEM (WABC) -- An outbreak of Legionnaires' disease in New York City has killed three people and sickened more than 90 people, according to the NYC Health Department.

As of August 11, there are 90 confirmed cases, 3 deaths, and 17 current hospitalizations.

Last week, the department reported 83 cases and 24 hospitalizations.

The NYC Health Department is currently investigating a community cluster of Legionnaires' disease in Central Harlem linked to ZIP codes 10027, 10030, 10035, 10037, and 10039.

The NYC Health Department is increasing enforcement for Legionella bacteria.

One provision will be a new lab certification for all buildings across the five boroughs.

There will also be new penalties that will go into effect next spring for landlords who violate reporting rules or fail to

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