E cigarettes Found to Cause Change in Mouth Bacteria Which Could Lead to Gum Disease or Oral Cancer Respiratory Therapy We were shocked': Vaping considerably increases lung cancer risk among people who smoke Just Like Cigarettes, Vaping Likely Causes Cancer, Major Study Finds Clinical Oncology Society of Australia concludes E cigarettes are likely to cause lung cancer and oral cancer Stanton Glantz blog While vaping is not risk free, it is less harmful than tobacco Our World in Data