E cigarettes branded 'harmful' as World Health Organisation calls for greater regulation to protect children UK News Sky News More than 100 million people around the world now use e cigarettes, including at least 15 million children, according to the World Health Organization (WHO). The organisation has warned that vaping is fuelling 2.3% of US population reports current e cigarette use Percentage of E cigarette Vape Users in Several Countries Around the Download Scientific Diagram E cigarettes: Facts, stats and regulations Regulation of electronic cigarettes Wikipedia