A third person has died of the Legionnaires’ disease outbreak in Harlem that has sickened close to 70 people, Mayor Eric Adams said Wednesday — confirming that the source

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

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.