Secondhand Vape Exposure: Effects, Who's at Risk, and More How Bad Is Second Hand Vape Smoke Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky What is Thirdhand Smoke? Thirdhand Smoke Resource Center Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand vaping may pose risk to your kids: New study