PolitiFact When someone's vaping nearby, what are you breathing in? The risks of vape pens' secondhand aerosols Parents using e cigs expose kids to dangerous secondhand vapor Futurity Second Hand Vape Smoke Vs Secondhand Cigarette Smoke Study shows second hand vaping exposure very low compared to second hand smoking Secondhand Smoke infographics VitalSigns CDC Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice The Generation That Will Always Be Too Young to Smoke The New Yorker