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% Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Is Second Hand Vape Harmful Children At Risk: Emory Study Uncovers The Hidden Dangers Of Secondhand Vape Exposure Second Hand Vaping Vs Smoking Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London