The Dangers of Vaping and Second Hand Smoke to Children Have you heard of Third Hand Smoke , When most people think about the risks of smoking, they picture first or second hand smokethe smoke you inhale or breathe when someone lights up near you. But Differing Opinions About Second Hand Vape Exposure Vaping Post First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me Chemicals