Respiratory Impact of Electronic Cigarettes and Low Risk Tobacco Experts warn that flavored e cigarettes can cause irreversible lung damage, as seen in a U.S. teenager who developed "popcorn lung"a severe and permanent condition called bronchiolitis obliteransafter secretly vaping for three years. E Cigarette or Vaping Associated Lung Injury New England Journal of Medicine Vaping and Electronic Cigarette Toxicity Overview and Recommendations (Project VECTOR) Intrepid Lab E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review This lung damage from e cigarettes is permanent and entirely preventable. Flavored e cigarettes, often marketed with candy like appeal, may be far more dangerous than they seem. A recent case involving a U.S.