Juul study shows secondhand vaping emissions are less toxic than cigarette smoke City Did you know that Secondhand vape and cigarette smoke have similar nicotine levels? For tips on how to protect yourself and your loved ones from toxic secondhand smoke please visit ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Children at risk: Emory study uncovers the hidden dangers of secondhand vape exposure Is Second Hand Vape Smoke Harmful To Children Where You Learn Smoke Free Environments