Study: E Cigs Have No Significant Impact on Lung Function Tobacco Reporter Acute respiratory and ocular effects of electronic cigarettes: A prepost experimental study in healthy users Harvard study finds lung damaging toxins in popular e cigarette products PhillyVoice 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 and Your Respiratory Health: Interview with Prof Polosa E Cigarette Direct