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

Nearly 60 people have become sick and two have died in an outbreak of Legionnaires' disease in New York City. Health officials there issued an alert on July 30 warning residents of Central Harlem who have flu-like symptoms to see a health care provider immediately.

By LAURA UNGAR An outbreak of Legionnaires’ disease in New York City has killed three people and sickened more than five dozen since late July. City health officials link the Central Harlem