Vaping refers to the act of inhaling and exhaling aerosol, often called vapor, produced by an electronic cigarette or similar device. These devices heat a liquid that usually contains nicotine, flavorings, and Is Second Hand Vape Smoke Harmful Secondhand smoke and secondhand aerosol Is 2nd Hand Vape Smoke Bad Is There 2nd Hand Smoke From Vapes Covid 19 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 Secondhand Electronic Cigarette Aerosol and Indoor Air Quality US EPA