Johns Johns Hopkins Bloomberg School of Public Health Which Electronic Cigarette Is Best for Quitting Smoking? X Bar 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 Vaping Q&A: Johns Hopkins Expert on E Cigarettes and Tobacco Alternatives Johns Hopkins Bloomberg School of Public Health Bloomberg School of Public Health Teaching & Research Additions Ziger Snead Architects