Secondhand vape plumes could form lung damaging radicals American Chemical Society Symptoms Of Second Hand Vape Smoke Can Second Hand Vape Smoke Affect Pregnancy Second hand smoke The Issues of Testing for Secondhand Smoke. Indoor Science 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%