It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center Secondhand vape plumes could form lung damaging radicals American Chemical Society Juul study shows secondhand vaping emissions are less toxic than cigarette smoke Thirdhand Smoke Resource Center Protecting Californians Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association