Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers Severe Pulmonary Disease Associated with Electronic CigaretteProduct Use Interim Guidance MMWR COPD: The Differences Between Emphysema and Bronchitis Affordable Portable Oxygen Concentrators 1st Class Medical Smoking poses severe dangers to lung health, including: 1. Lung Cancer Smoking is the leading cause of lung cancer, increasing the risk of developing this deadly disease. 2. Chronic Obstructive Pulmonary Disease (