5 Vaping Facts You Need to Know Johns Hopkins Medicine WHO estimates at least 15 million teenagers use e cigarettes worldwide Reuters Teenagers who vape sweet flavoured e cigarettes more likely to stick with habit, study claims The Independent The Independent Global study zeroes in on vaping's respiratory risks among exclusive e cigarette users E cigarette Use Persists Among Youth, New Data Shows Health Matters NYP What You Need to Know About Vaping American Heart Association