A comprehensive review of recent peer reviewed research provides the strongest evidence to date that using electronic cigarettes likely causes both oral and lung cancers in humans. https: modernsciences.org vaping likely causes oral lung cancer april The research looked at the chemical composition of "vape smoke" and assessed its cancer risk using data from published animal studies. Read more Similar DNA changes found in cells of both smokers and e cigarette users UCL News UCL University College London Lung cancer risks persist with e cigarette use after quitting tobacco smoking