Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Mayo Clinic Minute: Are e cigarettes safe? YouTube Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London What science says about vaping risks The Examination Another Gross Reason to Put Down the E Cigarettes American Lung Association The Dangers of Vaping Inspira Health