A third person has died from Legionnaires’ disease, as the number of known cases continues to grow in Central Harlem, according to the New York City Health Department. The number of known cases has grown to 67,

A t least three people have died in a Legionnaires’ disease outbreak in Harlem, authorities said in the most recent update, in the latest summer flare-up of the disease that officials say primarily impacts older people and is potentially linked to poorly maintained cooling towers.

When it comes to Legionnaires' disease, this doctor explains how buildings can prevent it and what symptoms to watch for an early diagnosis.