E cigarettes may be less harmful than regular cigarettes, but they aren't harmless. Here are a few of the risks of inhaling the aerosol or vapor a.k.a. vaping produced by e cigarettes: Vaping is the best substitute to stop smoking without compromising your respiratory health. Current research highlights a major reality: there is no evidence of significant change in short or medium term respiratory Frontiers Review of quantitative and functional lung imaging evidence of vaping related lung injury E cigarette use increases risk for developing major respiratory diseases