Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA 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% Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Addressing Secondhand Smoke: Tobacco and Cannabis Smoke in Multi Unit Housing Secondhand smoke from cigarettes worse than vapes UPI.com