E cigarette vapour contains two cancer causing chemicals, study says Logic Vape Save 10% on Logic E Cig Products Electronic Cigarettes and Vaping: Factsheet Positive Choices Louisiana Tobacco Control Initiative: Focused on Prevention Louisiana Cancer Research Center Vaping may 'wake up' cancer cells and trigger wave of disease in a decade's timeVaping may 'wake up' cancer cells and trigger wave of disease in a decade The Independent E cigarettes safer than smoking says long term study UCL News UCL University College London