E cigarettes less addictive than cigarettes Penn State University Study shows second hand vaping exposure very low compared to second hand smoking 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 The hidden threats of vaping and smoking on loved ones FMT E cigarette ads spread like second hand smoke on Twitter TheHealthSite.com Secondhand smoke exposure in womb linked to eczema in childhood