Secondhand smoke and aerosol 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% Is Secondhand Vape Smoke Bad for You? Baton Rouge General Does vaping (using e cigarettes) make a difference to our health and are there harms with second hand vaping? iHealth Facts Should I Be Concerned About Secondhand Vaping? E Cigarettes (Vapes) Smoking and Tobacco Use CDC