Secondhand Smoke Vermont Department of Health Effect of second hand fumes from vaping on young lungs The risks of vape pens' secondhand aerosols What is Thirdhand Smoke? Thirdhand Smoke Resource Center 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 E Cigs and Second Hand Vaping: Dangers and Protections