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% Fact Sheet: Secondhand Vape Aerosol and Kids Asian Smokers' Quitline (ASQ) Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at Study Claims That Secondhand Vapour Exposure Can Cause Serious Respiratory Issues Vaping Post