E cigarettes Found to Cause Change in Mouth Bacteria Which Could Lead to Gum Disease or Oral Cancer Respiratory Therapy Vaping likely to cause cancer: New research warns A major review led by researchers at UNSW Sydney says nicotine vaping may be linked to both lung cancer and oral Frontiers Review of quantitative and functional lung imaging evidence of vaping related lung injury E cigarette use increases risk for developing major respiratory diseases Health effects and known pathology associated with the use of E cigarettes ScienceDirect