Secondhand vape exposure: Risks and side effects ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Juul study shows secondhand vaping emissions are less toxic than cigarette smoke 5 Vaping Facts You Need to Know Johns Hopkins Medicine How to Smoke E Cigarettes Your First Vaping Guide SMOKO E Cigarettes Thirdhand Smoke Resource Center Protecting Californians