Why Youth Vape Smoking and Tobacco Use CDC That big claim that vaping leads to smoking may be based on insubstantial evidence Scaremongering about e cigarettes is not in the best interest of patients The Pharmaceutical Journal New HRB evidence shows e cigarettes are associated with adolescents starting to smoke tobacco cigarettes HRB Health Research Board Plain language summary of meta analysis of ecigs and disease available Stanton Glantz blog