"It borders on bizarre that critics like [West Virginia Senator Jay] Rockefeller continue to question the existence of those former smokers, even while arguing that e-cigarettes should be restricted or banned based on the that vaping will lead to smoking among teenagers who otherwise never would have tried tobacco."

They conclude that "our data add to the current evidence that e-cigarettes may not increase rates of smoking cessation."

It is so frustrating to me to wake up every day to find another anti-smoking group spreading fraudulent statements about the health effects of cigarettes. This truly undermines decades of public education about the dangers of smoking. And it helps protect the profits of cigarette companies at the expense of the protection of the public's health.

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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