How Long Does Second Hand Smoke Stay in Your System Does Vape Have Second Hand Smoke Secondhand vaping may pose risk to your kids: New study Study shows second hand vaping exposure very low compared to second hand smoking Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Secondhand Smoke and Electronic Cigarette Aerosols US EPA Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association