Vaping Q&A: Johns Hopkins Expert on E Cigarettes and Tobacco Alternatives Johns Hopkins Bloomberg School of Public Health research@BSPH Johns Hopkins Bloomberg School of Public Health Johns Hopkins Bloomberg School of Public Health Epidemiology Department Baltimore MD Johns Hopkins Public Health The Johns Hopkins Institute for Global Tobacco Control's VAPER Study collected data on the most commonly used devices and liquids by U.S. Instagram PDF) Metal Concentrations in e Cigarette Liquid and Aerosol Samples: The Contribution of Metallic Coils Are E Cigarettes and Vapes The Same Thing?