Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand Smoke and Electronic Cigarette Aerosols US EPA Secondhand vape exposure detectable in children's saliva, breath Contemporary Pediatrics Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice