Is Secondhand Vape Smoke Bad for You? The Truth on the Trend Molekule ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, HEALTH Does vaping cause secondhand smoke? Doctors explain the side effects: Details below. Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Is Secondhand Vaping Something to be Concerned About? Secondhand Smoke Vermont Department of Health