2nd Hand Vape Smoke Effects Does cannabis create thirdhand smoke? E Cigs and Second Hand Vaping: Dangers and Protections 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 Ben Experts are sounding the alarm about the impacts of second hand vaping. They say it may have the same risks as 'passive smoking'. Listen to the President of the Australian Is Second hand Vapour Harmful To Others?