Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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 Chemicals 2nd Hand Vape Smoke Effects Secondhand Smoke and Electronic Cigarette Aerosol Resources According to the American Heart Association, the risks of secondhand smoke from vapes are still being discovered. Learn about the dangers of secondhand smoke from vapes.