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 Smoke Vermont Department of Health Secondhand smoke from cigarettes worse than vapes UPI.com Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Secondhand smoke from vaping could be harmful to children: study ABC13 Houston