Passive vaping time we see it like secondhand smoke and stand up for the right to clean air Where is Thirdhand Smoke? Thirdhand Smoke Resource Center Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at While vapes are less harmful than cigarettes, they shouldn't be used by those who don't smoke. Vaping and nicotine can have a harmful effect on the body, especially in children