E cigarettes may be harmful to health an annotated graphic Engineering & Technology magazine E cigarettes 95 percent less harmful than tobacco, UK study says Fox News Are e cigarettes safer than cigarettes? UPMC MyHealth Matters Is Second Hand Vapor from E Cigarettes Dangerous? [Infographic] The Local Brand Smoking VS Vaping: Which is More Harmful to Your Dental Health? Riverside Dental New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking