Is Secondhand Vaping Harmful To Your Health? 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 Solving secondhand "vape smoke" at workand at home 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 health risks of secondhand smoke are widely understood. But what about secondhand vaping? HEALTH Does vaping cause secondhand smoke? Doctors explain the side effects: Details below.