Vaping is more popular with teens than ever, with more than one-third of high school students reporting having tried e-cigarettes. To evaluate e-cig use, the CDC and the US Food and Drug Administration poured through surveys filled out by 17,000 middle and high school students across the US in 2015. About 38 percent of high school students and 13 percent of middle school students reported that they’ve tried e-cigarettes.