E Cigarettes Promote Macrophage Tumor Cells Crosstalk: Focus on Breast Carcinoma Progression and Lung Metastasis Smoking, vaping called a deadly combination for lung cancer risk UPI.com E cigarette vapor linked to cancer in mice National Institutes of Health (NIH) Exposure to PM2.5 and E cigarette can potentially put you at greater risk of lung cancer . Both exposure to PM2.5 air pollution and e cigarette use are linked to an increased risk of Former smokers who vape now still need to be screened for lung cancer. Many of them aren't