Vaping can cause cancer, say researchers but still isn't as damaging as smoking cigarettes. More than 5.5 million Britons currently use e cigarettes, which have long been viewed as a safer alternative Dangers of Vaping: Why E Cigarettes Are Harmful to Health What You Need to Know About Smoking and Lung Cancer Australian researchers have issued one of the strongest warnings yet about vaping, saying a major review of evidence suggests e cigarettes are likely to cause lung and oral cancer. The review found signs Psychiatry.org Vaping is Unhealthy. Tips and Resources to Help Quit.