National Emphysema Foundation E cigarettes are Poor Substitutes for Conventional Smoking in COPD Patients E cigarette use and respiratory disorders: an integrative review of converging evidence from epidemiological and laboratory studies European Respiratory Society Frontiers Inhalation of nicotine containing electronic cigarette vapor exacerbates the features of COPD by inducing ferroptosis in ENaC overexpressing mice Vaping is not harmless. A new study from Johns Hopkins Medicine reveals that e cigarettes significantly increase the risk of COPD and high blood pressure. Our own Dr. Todd Hoopman shares