Frontiers Pulmonary function and physical performance in adolescent e cigarette users: a narrative review Evidence update on the cancer risk of vaping e cigarettes: A systematic review Flavored e cigarettes are causing permanent lung damage. E cigarettes heat liquid chemicals into an aerosol designed to be inhaled deeply. That delivery method matters. Like a medical nebulizer, vaping efficiently carries substances straight Cardiopulmonary Impact of Electronic Cigarettes and Vaping Products: A Scientific Statement From the American Heart Association Circulation asthma tobacco Asthma Initiative of Michigan