A fourth case of potentially deadly Legionnaires’ disease has been reported in Sydney, prompting a fresh health alert.

An outbreak of Legionnaires' disease in New York City's Harlem neighborhood thought to have originated in contaminated cooling towers has killed five people and put 14 in the hospital, health officials announced.

An outbreak of Legionnaires’ disease in New York City’s Harlem neighborhood has claimed the lives of four people, according to the city’s Department of Health.

The Legionnaires’ disease outbreak in Harlem has worsened, with two confirmed deaths and at least 58 diagnosed cases reported as of Monday. This marks a significant increase from last week, when one person had died and 22 were sick.

Australian health officials have confirmed that six individuals have been hospitalized following an outbreak of Legionnaires’ disease in Sydney’s bustling city centre.