Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase HEALTH Does vaping cause secondhand smoke? Doctors explain the side effects: Details below. ? () 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 Is Second Hand Vape Smoke Harmful To Children Where You Learn Smoke Free Environments