Image of e-cigarette

There’s a lot of discussion today about e-cigarettes. Will they help current smokers quit smoking? Will they jeopardize public health efforts that aim to make cigarette smoking socially unacceptable, or could their popularity further denormalize cigarette smoking? Will they be a gateway into cigarette smoking for young people? If e-cigarettes are less harmful than conventional cigarettes, does stigmatizing e-cigarettes threaten public health efforts?