Stealth vaping among college students on four geographically distinct tobacco-free college campuses: prevalence and practices.

This sample of college student e-cigarette users commonly violated campus smoke- and tobacco-free policies by stealth vaping on campus. Respondents used a range of methods (e.g., smaller device, low visibility e-liquids) and locations (e.g., bathrooms, libraries, parking garages) for stealth vaping. If campus policies are to be effective at reducing on-campus e-cigarette use, there is a need for enhanced monitoring and enforcement. E-cigarette devices specifically designed and marketed to facilitate stealth vaping (e.g., resembling USB flash drives, pens, etc.) may require regulatory action. More research is needed to better understand factors influencing stealth vaping behaviors and public health implications.