Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center 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 vaping: The latest vaping health risk CNET Should I Be Concerned About Secondhand Vaping? Secondhand Vape Exposure: Effects, Who's at Risk, and More