Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Secondhand smoke and secondhand aerosol ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Secondhand Smoke Facts: Worse Than Smoking, Effects, and More Debunking 7 Myths About Secondhand Smoke 5 Vaping Facts You Need to Know Johns Hopkins Medicine