More than 100 million people around the world are using e-cigarettes, according to "alarming" estimates from the World Health Organisation, with almost 15 million teenagers believed to vape. In its report - the health body's first ever tracking of the use of vapes and other electronic smoking devices - the WHO said that figure includes at least 86 million adults, mostly from high-income countries. But the report said 14.7 million of the total believed to use e-cigarettes were reportedly