Officials say the Legionnaires disease outbreak in Harlem is contained, but are still telling residents to watch for systems as they clean cooling systems in the area.

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

The deadly Legionnaires' disease outbreak in Harlem continues to spread, forcing residents to be hyper-vigilant and on the look-out for the flu-like symptoms associated with the illness.