How secondhand smoke, thirdhand smoke & vaping affects kids Effects of Secondhand Smoke: Dangers, Prevention, and More Protect Babies and Kids from Vaping Risks The health risks of secondhand smoke are widely understood. But what about secondhand vaping? 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