Inhalation Toxicology of Vaping Products and Implications for Pulmonary Health PET imaging shows greater lung inflammation in e cigarette users than cigarette smokers 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, The evidence is clear: Young E cigarette users suffer from respiratory symptoms American Lung Association New strong evidence that Juul is more toxic to lungs and hearts than earlier e cigs Stanton Glantz blog EVALI: New information on vaping induced lung injury Harvard Health