Health unit says e cigarette usage in teens is 'concerning' Sudbury News Just published the first randomized controlled trial of varenicline for vaping cessation CoEHAR Belgium is taking a strong and necessary step to protect young people By restricting flavours in e cigarettes, it is tackling a key factor driving youth uptake. Flavours like fruit and Vaping is likely to cause oral and lung cancer, according to a comprehensive review of over 100 studies of the effects of nicotine based e cigarettes, published this week in the journal, Carcinogenesis.