Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine 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% Tobacco Smoke, Vaping, and Asthma AAFA.org E Cigarettes and Vaping Tear Pad Health Edco Secondhand vaping may pose risk to your kids: New study