The hidden threats of vaping and smoking on loved ones FMT Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at 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 Watching Others Use E cigarette may Boost Desire to Smoke Among Teens Fact check: Second hand smoke is dangerous The Independent Clive Bates, David Sweanor and Murray Laugesen: E cigarettes could help half million Kiwi cigarette smokers NZ Herald