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

The Legionnaires' disease outbreak in NYC is now blamed for a third death and continues to spread. CBS News New York spoke with one doctor who explained anyone can be diagnosed with the disease, and some people are more at risk.

Three people have died and 67 others have been diagnosed with Legionnaires’ disease in New York City in recent weeks. The illness, a type of pneumonia caused by Legionella bacteria, mainly affects people over 50,