Johns Hopkins Medicine Team Proposes Ways to Regulate and Better Manage E Cigarette Use Johns Hopkins Medicine Yes, Cigarettes Are Very Bad For You But So is Vaping: Many people turn to e cigarettes as a way to quit smoking or reduce harm, but the high nicotine levels in Cardiopulmonary Impact of Electronic Cigarettes and Vaping Products: A Scientific Statement From the American Heart Association Circulation E cigarette Characteristics, Safety Issues, & Regulation Britannica An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link