Secondhand smoke and secondhand aerosol Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN The Impact of E Cigarettes and Asthma: What You Need to Know What is secondhand smoke: All about secondhand smoke that you should know Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect