PET Imaging Shows Greater Lung Inflammation in e cigarette Users than Cigarette Smokers Imaging Technology News Lab study shows cigarette smoke damaged lung cells more than e cigarette vapor Figure 2 from Lung Injury and Lung Cancer Caused by Cigarette Smoke Induced Oxidative Stress: Molecular Mechanisms and Therapeutic Opportunities Involving the Ceramide Generating Machinery and Epidermal Growth Factor Receptor Semantic Scholar E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review The Mysterious Vaping Illness That's 'Becoming an Epidemic' The New York Times