Passive vaping time we see it like secondhand smoke and stand up for the right to clean air Addressing Secondhand Smoke: Tobacco and Cannabis Smoke in Multi Unit Housing Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN