Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Secondhand Tobacco Smoke (Environmental Tobacco Smoke) Cancer Causing Substances NCI FACT: Most e cigarette users also smoke cigarettes, a pattern known as dual use. This means the tobacco industry isn't helping people quit; it's sustaining addiction through another product. While the industry claims Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy The hidden threats of vaping and smoking on loved ones FMT