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.

New York City’s ongoing outbreak of Legionnaires’ disease in Central Harlem, which has killed three people and sickened dozens more, is the latest in a series of similar clusters that have made headlines in recent years, usually in the summer months.