Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Can you get second hand smoke from a vape How secondhand smoke, thirdhand smoke & vaping affects kids 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 How Do You Know When a Vape Pen Is Empty? 5 Key Signs E Cigs and Second Hand Vaping: Dangers and Protections