Tobacco and Cancer Cancer CDC E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Do E Cigarettes Cause Cancer? E cigarette vapor linked to cancer in mice National Institutes of Health (NIH) E Cigarettes Vaping Child Development and Health E Cigarettes Promote Macrophage Tumor Cells Crosstalk: Focus on Breast Carcinoma Progression and Lung Metastasis