Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Is Vaping Worse Than Smoking? St. Vincent's Medical Center Does Vaping Cause Lung Cancer? Research and Facts Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Vaping substantially less harmful than smoking, largest review of its kind finds King's College London Teens Who Vape Are More Likely to Start Smoking SPH