 Lung cancer kills more people than breast, colorectal, and prostate cancers combined. Up to 65% of those diagnosed have never smoked or quit smoking. New treatments have improved survival. So does lung cancer screening. The American Cancer Society and American Lung Association urge current and former heavy smokers ages 55 to 80 to get a yearly lung CT scan. If you smoke, ask your doctor to help you quit. Visit the National Lung Cancer Roundtable at nlcrt.org.