Vaping harms your health Cancer Institute NSW JUUL E Cigarettes Harrison County Health Department Know the Risks: E cigarettes and Young People Community Commons E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Health effects and known pathology associated with the use of E cigarettes ScienceDirect