Secondhand Vape Exposure: Effects, Who's at Risk, and More Study shows second hand vaping exposure very low compared to second hand smoking It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center 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