E Cigarette or Vaping Associated Lung Injury New England Journal of Medicine Smoking has long been known as a major cause of lung cancer, but now, even vapes and e cigarettes are contributing to the risk. This World Lung Day, let's raise awareness and make E Cigarettes Promote Macrophage Tumor Cells Crosstalk: Focus on Breast Carcinoma Progression and Lung Metastasis E cigarette vapor linked to cancer in mice National Institutes of Health (NIH)