Do Vapes Have Second Hand Smoke We protect kids from cigarette smokelet's do the same Tobacco Smoke, Vaping, and Asthma AAFA.org 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% Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine