There are still many unknowns involving e-cigarettes, including much about their long-term effects and the definitive cause or causes of a growing number of vaping-related lung illnesses. What is clear, however, are the health risks these nicotine products pose to young people. “The recent surge in e-cigarette use among youth, which has been fueled by new types of e-cigarettes that have recently entered the market, is a cause for great concern,” Surgeon General Jerome Adams said in a December 2018 advisory.