Growing the research evidence on e cigarettes by Research at CRUK Medium E cigarettes: 'cancer risk close to zero' Bhekisisa E Cigarettes and Breast Cancer: Is Vaping Really Safer? E cigarettes can cause cancer even when they are nicotine free, scientists claim The Mirror Young adult cancer survivors more likely than peers to use e cigarettes How Switching to E Cigarettes After Smoking Cessation Affects Lung Cancer Risk