Two top cancer organizations highlight how e cigarettes are linked with early steps in cancer development and call for flavor bans : r science Louisiana Tobacco Control Initiative: Focused on Prevention Louisiana Cancer Research Center 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 Vaping Linked to Cancer Risk, New Study Finds Lung Cancer Europe posted on the topic LinkedIn E Cigarettes, Vaping and Chew FAQ's Medical Clinic Marquette University Clinical Oncology Society of Australia concludes E cigarettes are likely to cause lung cancer and oral cancer Stanton Glantz blog