A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews E Cigarettes and Vaping OHSU Comparing the cancer potencies of emissions from vapourised nicotine products including e cigarettes with those of tobacco smoke Tobacco Control Can Vaping Cause Cancer? Lung, Oral, and Bladder Growing the research evidence on e cigarettes by Research at CRUK Medium The Side Effects and Cancer Risk Associated with Vaping