The risks of vape pens' secondhand aerosols 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 vaping exposure very low compared to second hand smoking UCL News UCL University College London 2nd Hand Vape Smoke Effects Second hand Vaping Vs Smoking Can You Get Second Hand Smoke 2nd Hand Vape Smoke Effects The Issues of Testing for Secondhand Smoke