The more you know, the safer the choices you can make. E cigarettes and vape pens are not harmless. Many contain nicotine and other chemicals that can impact brain development, lung health, Young vapers at higher risk of bronchitis and shortness of breath Scimex How Dangerous Is Vaping? YourCareEverywhere Smoking cigarettes has long been proven to cause severe lung damage, including chronic obstructive pulmonary disease (COPD), emphysema, and lung cancer. Over time, cigarette smoke destroys lung tissue, fills airways with tar, Bronchiectasis: Causes, Symptoms, Treatment & Prevention