E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Second hand vape smoke linked to more asthma symptoms in kids How Long Does Second Hand Smoke Stay in Your System When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Does Vape Have Second Hand Smoke Asthma and Allergy Foundation