Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London How to Smoke E Cigarettes Your First Vaping Guide SMOKO E Cigarettes ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Can I be Affected by Secondhand Vape Smoke? Juul study shows secondhand vaping emissions are less toxic than cigarette smoke