Health experts warn that flavored e cigarettes may lead to permanent lung damage. A U.S. teenager was diagnosed with "popcorn lung" after covertly vaping for three years, resulting in a lifelong, debilitating condition. Vaping Could Make You 40 Percent More Likely to Get Respiratory Disease The Brink Boston University The Signs of Vaping Lung Disease Hackensack Meridian Health E cigarette induced changes in cell stress and mitochondrial function ScienceDirect How Long Do Lungs Take To Heal After Vaping How E Cigarettes Affect Your Lungs: Results Of An Online Survey Of Users E Cigarette Direct Does It Australia Pilot Study Shows Even Short Term 'Vaping' Causes Inflammation in Non Smokers