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 Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society E cigarettes Found to Cause Change in Mouth Bacteria Which Could Lead to Gum Disease or Oral Cancer Respiratory Therapy Cigarette lectronique et Cancer : Ce qu'il faut savoir