Effect of second hand fumes from vaping on young lungs Tobacco Smoke, Vaping, and Asthma AAFA.org Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Complete Guide to Secondhand Vaping Devices Vape Direct Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN