What Are Electronic Cigarettes? NIH News in Health Youth and vaping: No such thing as risk free Hamilton Health Sciences Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Vaping substantially less harmful than smoking, largest review of its kind finds King's College London Vaping: From Safer Than Cigarettes to Public Health Crisis How To Smoke A Vape Like A Pro