On the heels of the Federal Drug Administration's second public workshop to explore the public health considerations associated with e-cigarettes, researchers explore the composition of e-cigarette vapor and the potential health impacts of secondhand exposure. On the heels of the Federal Drug Administration's second public workshop to explore the public health considerations associated with e-cigarettes, nonprofit research organization RTI International released a new research paper "Exhaled Electronic Cigarette Emissions: What's Your Secondhand Exposure?," which explores the composition of e-cigarette vapor and the potential health impacts of secondhand exposure.