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.

The source of the illness has not been conclusively identified more than a week after people began getting sick.

An investigation is underway after an outbreak of Legionnaires' disease in Harlem has killed three people and sickened 73 others since late July. New York City Council Member Yusef Salaam plans to hold a press conference to help inform residents about the Legionnaires' outbreak in the area.