Joyce Mack, 60, says ever since contracting Legionnaires' disease, she feels trapped in her apartment by a heavy machine that helps her breathe and in her mind by the fear of losing her life. "I watch TV all night. I will not go to sleep," she said. "I'm scared if I go to sleep, I might not wake up."

About one in 10 people who get sick from Legionnaires' disease die from the disease due to complications from illness, CDC said.

A Legionnaires' disease cluster in the Harlem area of New York City has caused six deaths and sickened over 110 people. Here's what it is, symptoms and how it's spread.