Smokers 'Do Much Worse' With Coronavirus and Many Are Now Trying to Quit KQED Pulmonary toxicity of e cigarettes American Journal of Physiology Lung Cellular and Molecular Physiology American Physiological Society Vaping, Panic, and Prohibition: Why the UC Davis Study Needs Context Cato at Liberty Blog Study: (Non FDA Approved) Vapes Emit More Toxic Metals Than Cigarettes Tobacco Reporter A new study from the University of California, Davis, reveals that popular disposable vapes from brands like ELF Bar, Esco Bar, and Flum Pebble emit more lead than smoking 20 packs of Disposable vapes spew toxic metals at higher levels than cigarettes, study finds