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 Study of smoking cancer patients fuels e cigarette debate Fox News E cigarettes and cancer: new report faces sharp criticism Vejpkollen.se 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 Untitled Vaping and smoking together increases lung cancer risk fourfold