This is true regardless of their age or how long they’ve been smoking. This report makes it clear that one of the most important actions people can take to improve their health is to quit smoking. Although the percentage of adults who smoke is at an all-time low in the U.S., 34 million adults still smoke and therefore continue to be at risk of developing smoking-related diseases. Smoking remains the leading cause of preventable disease, disability, and death in the U.S.
