What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Health Risks of E Cigarettes and Vaping American Lung Association 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% The Impact of E Cigarettes and Asthma: What You Need to Know What Does Vaping Do to Your Lungs? Johns Hopkins Medicine