Is Secondhand Vape Smoke Bad for You? Baton Rouge General Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Sleeping baby safety tip: Keep baby's environment smoke and vape free. Secondhand smoke in areas where a baby sleeps or spends time, like home or the car, increases the risk of health problems. Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect How Long Does Second Hand Smoke Stay in Your System Juul study shows secondhand vaping emissions are less toxic than cigarette smoke