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 Research is still evolving, but evidence continues to point to a link between smoking and breast cancer risk. From firsthand and secondhand smoke to vaping and cannabis, here's what scientists knowand what E Cigarette Smoke Causes Lung Cancer in Mice NYU Langone News E cigarettes and cancer: new report faces sharp criticism Vejpkollen.se Vaping and smoking together increases lung cancer risk fourfold