Effects of Secondhand Smoke: Dangers, Prevention, and More Vaping not only affects your own health, it can also harm your loved ones and those around you. Passive (or second hand) vaping can happen when you're vaping in the same room, First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me Health experts say not to 'vape' around children, because the secondhand aerosol (it isn't vapor) from e cigs isn't safe for them Kentucky Health News