Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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 Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Can You Get Secondhand Smoke From a Vape or E Cigarette?