Are electronic cigarettes a gateway to adolescent smoking?

A closer look at the evidence suggests vaping might be diverting adolescents away from tobacco, writes Dr Colin Mendelsohn.

A COMMONLY raised concern about electronic cigarettes (e-cigarettes) is that they may be a gateway to smoking for adolescents - that they may encourage nicotine addiction and progression to tobacco smoking in young people who would not otherwise have smoked. 

This argument is