Three people have died and at least 67 people have been diagnosed with Legionnaires’ disease in a cluster that broke out in New York City last week.

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 5over 60 people to be sickened. Here's what it is, symptoms and how it's spread.