Can I be Affected by Secondhand Vape Smoke? Effect of second hand fumes from vaping on young lungs What is Thirdhand Smoke? Thirdhand Smoke Resource Center Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY 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%