How can I protect my child from thirdhand smoke in homes? Thirdhand Smoke Resource Center Breathing in someone else's smoke or vape isn't harmless. Secondhand smoke exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de In secondhand vape, scientists smell risk American Heart Association Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN