Many Young Adults Who Began Vaping as Teens Can't Shake the Habit KFF Health News What science says about vaping risks The Examination Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Discover ePuffer Nicotine Free Vape Devices: Disposable E Cigarettes, E Cigars, and E Liquid Flavours in Canada Vaping' Increases Odds of Asthma and COPD Johns Hopkins Medicine Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times