Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Secondhand Smoke and Electronic Cigarette Aerosols US EPA Second Hand Vaping: A Problem or Not? My Vapery UK Differing Opinions About Second Hand Vape Exposure Vaping Post Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals