Using nicotine based vapes is likely to cause lung and oral cancer, even if e cigarette users do not smoke tobacco, a watershed academic review has found. Breast Cancer & E Cigarettes: Is Vaping a Safer Alternative to Smoking? Maurer Foundation E Cigarettes and Their Use in the U.S. and Kansas Kansas Health Institute Dual cigarette and e cig use increases human risk of lung cancer 40 times Stanton Glantz blog