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 Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Secondhand vape exposure: Risks and side effects