A national panel of public health experts concluded in a report released on Tuesday that vaping with e-cigarettes that contain nicotine can be addictive and that teenagers who use the devices may be put at higher risk of switching to traditional smoking. From a report: Whether teenage use of e-cigarettes may lead to conventional smoking has been intensely debated in the United States and elsewhere. While the industry argues that vaping is not a steppingstone to conventional cigarettes or addiction, some antismoking advocates contend that young people become hooked on nicotine, and are enticed to cancer-causing tobacco-based cigarettes over time. The new report by the National Academies of Sciences, Engineering and Medicine is the most comprehensive analysis of existing research on e-cigarettes. It concluded the devices are safer than traditional smoking products and that they do help smokers quit, citing conclusive proof that switching can reduce smokers' exposure to deadly tar, numerous dangerous chemicals and other carcinogens.