A Legionnaires' disease cluster in New York City has grown, with two deaths and more than 50 others sickened so far, officials said. The New York City Department of Health said in an update Aug. 4 that 58 people in Central Harlem have been diagnosed with Legionnaires' disease since July 25. Two people have died so far, NYC Health said.

Legionnaires' disease has infected over 50 New York City residents, according to an Aug. 4 news release from the New York City Health Department. Since July 25, 58 people have been diagnosed with the disease and two people have died from it.

Legionnaires' disease is caused by Legionella, a bacteria that can travel through water systems and devices. Although most healthy people don't contract it, it can be deadly for those who do.