Thirdhand smoke is the toxic chemical residue left behind after someone smokes or vapes tobacco. Thirdhand smoke sticks to surfaces and objects. Sometimes thirdhand smoke residue can be easy to see or Second Hand Vaping: Minimal Impact Compared to Smoking Have you heard of Third Hand Smoke , When most people think about the risks of smoking, they picture first or second hand smokethe smoke you inhale or breathe when someone lights up near you. But Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record Risks of Using with COVID 19 Tobacco Prevention Toolkit Stanford Medicine How to Inhale a Vape (Without Coughing!) Ashtray Blog E Cigarette Direct