Breadcrumb Home More adults trying e-cigarettes, fewer keep using them Wednesday, June 6, 2018 http://www.stltoday.com/news/national/more-us-adults-try-vaping-but-current-use… A study led by Wei Bao of the UI College of Public Health finds 1 in 7 adult Americans have tried e-cigarettes, but fewer people are continuing to use the devices.