Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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 second hand vape smoke Should I Be Concerned About Secondhand Vaping? Secondhand Smoke and Electronic Cigarette Aerosols US EPA Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals