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 Vaping Now Linked to Cancer? A Recent Study Linking Lung Cancer to Mice Suggests A Possibility Occupational Health & Safety Vapers May Be Less Likely to Undergo Lung Cancer Screening MedPage Today Vaping Is Likely To Cause Cancer, Major New Aussie Study Finds: 'Only A Matter Of Time'