Second hand vape smoke linked to more asthma symptoms in kids Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek The health risks of secondhand smoke are widely understood. But what about secondhand vaping? 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%