Tobacco Smoke, Vaping, and Asthma AAFA.org Differing Opinions About Second Hand Vape Exposure Vaping Post Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Secondhand vape plumes could form lung damaging radicals American Chemical Society It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center