Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Composition of electronic cigarette aerosol Wikipedia What harm does second hand fumes from vaping cause to young lungs? Medical experts want to know ABC11 Raleigh Durham Secondhand vape exposure: Risks and side effects Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London