The Rest of the Story

I then explain that the gateway hypothesis is actually unsupported by any scientific evidence and that there is some evidence which is inconsistent with the hypothesis.

Whether e-cigarette use precedes smoking or smoking precedes e-cigarette use is a critical question, but it is one which needs to be answered through longitudinal research. We need studies that follow the trajectory of teen tobacco/e-cigarette use over time. That is the only way to determine which comes first.

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