Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Smoke Tips to Navigate Life with a Smoker Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center Secondhand vape exposure: Risks and side effects First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA