Effects Of Second Hand Vape Smoke Is Secondhand Vaping Harmful To Your Health? First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me 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. Vaping is less harmful than smoking, experts say. Why don't smokers know this? Scienceline 5 Vaping Facts You Need to Know Johns Hopkins Medicine