Rethinking Vaping 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 Clinical Oncology Society of Australia concludes E cigarettes are likely to cause lung cancer and oral cancer Stanton Glantz blog e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa