According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% Parents using e cigs expose kids to dangerous secondhand vapor Futurity Early research says secondhand smoke from vaping may not be as bad as cigarettes, but it's still not harmless. https: fox59.com news national world does vaping cause secondhand smoke doctors explain the side effects Is Second Hand Vapor from E Cigarettes Dangerous? [Infographic] Techno FAQ What Are the Risks from Secondhand Vape Smoke? NVB Inc. Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA