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 Secondhand Smoke Vermont Department of Health Amazon.com: NICOTESTS Nicotine Second Hand Smoke and Vape 10 ng Test (5 Pack) : Health & Household Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy In secondhand vape, scientists smell risk American Heart Association