National Emphysema Foundation E cigarettes and Vaping Just As Bad On Lung Health As Cigarettes Vaping' Increases Odds of Asthma and COPD Johns Hopkins Medicine COPD is a progressive, largely irreversible airflow limitation characterized by chronic cough, sputum production, and dyspneamost commonly due to smoking. Spirometry (FEV FVC < 0.7) confirms diagnosis; smoking cessation is the most effective Understanding chronic bronchitis and living life with COPD GoHealth Urgent Care COPD What Smoking is Really Doing to Your Lungs ABILITY Magazine