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 Secondhand Smoke Vermont Department of Health 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