Secondhand Vape Plumes Could Form Lung damaging Radicals 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% Secondhand vape plumes could form lung damaging radicals Project Filter Secondhand Vape Informational Poster #2 Idaho Health Tools Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand smoke and secondhand aerosol