2. Electronic cigarettes are a form of tobacco.

5. Quality control for stated nicotine levels; and

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.

"It should be emphasized that neither of these studies was designed to capture a representative sample of all vapers. Instead they focus on the most enthusiastic among them, whom you would expect to have had especially satisfying experiences with e-cigarettes. The high success rates in these surveys therefore are unlikely to be seen among the broader group of smokers who try to quit with e-cigarettes, let alone among smokers who merely try the product out. But these surveys do indicate that e-cigarettes have helped many smokers quit."

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