The Dangers of Secondhand & Thirdhand Smoke Exposure ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase E Cigs and Second Hand Vaping: Dangers and Protections Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA