The health risks of secondhand smoke are widely understood. But what about secondhand vaping? 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 Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Parents using e cigs expose kids to dangerous secondhand vapor Futurity