While vaping is not risk free, it is less harmful than tobacco Our World in Data Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy Protecting Youth From the Harms of Vaping Smoking and Tobacco Use CDC Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek