According to the Centers for Disease Control and Prevention, more people die from
lung cancer than any other cancer type. In fact, according to 2004 data, more people died from lung cancer than breast, prostate and colon cancers combined.
Smoking is the biggest risk factor for developing lung cancer, even after quitting for long periods of time. But only 10% of smokers get lung cancer and almost 50% of lung cancer cases involve former smokers.