Does Vaping Cause Secondhand Smoke? Secondhand aerosol from vapes still exposes others to harmful substances. #SecondhandExposure #HealthySpaces #YouthHealth Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy In secondhand vape, scientists smell risk American Heart Association Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London