People usually develop symptoms of Legionnaires’ disease around two to 14 days after being exposed. People often get the disease by inhaling mist from contaminated water, but it is not spread from person to person. Symptoms include fever, muscle aches and coughing.

Four people in New York City's Harlem neighbourhood have died from an outbreak of Legionnaires' disease, an aggressive and potentially deadly form of pneumonia. The city has seen 99 confirmed cases with 17 people in hospital with the infection, according to the New York City Department of Health.

The last of 12 cooling towers that tested positive for the bacteria currently spawning a Legionnaires’ outbreak in Harlem is being remediated Friday, with officials hoping containment efforts will help prevent another death.