Are Electronic Cigarettes a Gateway to Tobacco Use? Is 2nd Hand Vape Smoke Bad Health Problems Caused by Secondhand Smoke Smoking and Tobacco Which Smoking Habit Puts You Most at Risk? New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Vaping vs. smoking: Long term effects, benefits, and risks Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM