How Long Does Marijuana (Weed) Stay in Your System? Can Secondhand Marijuana Smoke Cause a Failed DOT Drug Test? The Science and the Defense That Won't Work Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Prevalence of vaping, vaping associated short term symptoms of respiratory and cardiovascular morbidities, and factors associated with the initiation of vaping among young adults in Kuwait Secondhand Vape Exposure: Effects, Who's at Risk, and More