Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Thirdhand Smoke Resource Center Protecting Californians Secondhand Smoke Vermont Department of Health Secondhand Vape Exposure: Effects, Who's at Risk, and More Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase How can I protect my child from thirdhand smoke in homes? Thirdhand Smoke Resource Center