Elevated risk of developing COPD with e cigarette use: Study Health Risks of E Cigarettes and Vaping American Lung Association Health Effects of Cigarettes: Chronic Obstructive Pulmonary Disease (COPD) Smoking and Tobacco Use CDC Vaping and COPD: Is it okay or can it cause more problems? E cigs: What You Need to Know if You Care for Patients with COPD Challenges in COPD How E Cigarettes Affect Your Body