Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Study shows second hand vaping exposure very low compared to second hand smoking Secondhand Tobacco Smoke (Environmental Tobacco Smoke) Cancer Causing Substances NCI The hidden threats of vaping and smoking on loved ones FMT 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