E cigarettes dont burn tobacco like traditional cigarettes. Instead, a battery heats a liquid mixture that turns into an aerosol a cloud of tiny droplets carrying flavorings and sometimes E cigarettes, Juuls and Heat Not Burn Devices: The Science and Regulation of Vaping Hopkins Bloomberg Public Health Magazine LES CIGARETTES LECTRONIQUES ET LES VAPES JETABLES PEUVENT ELLES TRE SMOKO E Cigarettes They're Far from Harmless, but E Cigarettes Can Get People off Tobacco Scientific American