People who smoke fewer than five cigarettes a day cause long-term damage to their lungs, according to a new study led by researchers at Columbia University Vagelos College of Physicians and Surgeons.
“Many people assume that smoking a few cigarettes a day isn’t so bad,” says study leader Elizabeth Oelsner, MD, a Herbert Irving Assistant Professor of Medicine at Columbia University Vagelos College of Physicians and Surgeons. “But it turns out that the difference in loss of lung function between someone who smokes five cigarettes a day versus two packs a day is relatively small.”