E cigarettes are likely to cause cancer, including in the lungs and mouth, according to a sweeping review of scientific evidence that challenges their positioning as a safer alternative to smoking. There is E Cigarettes and Cancer Risk Request PDF Vaping and smoking together increases lung cancer risk fourfold Growing the research evidence on e cigarettes by Research at CRUK Medium Breast Cancer & E Cigarettes: Is Vaping a Safer Alternative to Smoking? Maurer Foundation