Anecdotes are in fact data. Of course, what you do with that data and how you interpret it is affected by the nature of how the data were obtained. But anecdotes are data. Remember, the connection between smoking and lung cancer itself was first uncovered by a case series. Physicians started to note multiple cases of lung cancer - which was very rare at the time - all occurring in smokers. While these patients could be called "anecdotes," they were also people who provided very real and important data that led to the discovery that smoking causes lung cancer. That connection would not have been found had these "anecdotes" been dismissed.

The biggest gap between an e-cigarette and a normal cigarette is the fact that a normal cigarette has a distinct burnt tobacco taste and “hit” that smokers associate with the satisfaction of smoking. It is hot, burns the throat, fills the lungs, and feels good upon exhale.

That the CDC has apparently drawn pre-determined conclusions about these questions is both inappropriate and unfortunate. And it is not only unscientific but it precludes the agency from making evidence-based decisions or recommendations.

In contrast, however, to the lack of evidence that electronic cigarettes are having any negative public health effects, there is strong evidence to suggest that these products are having a substantial positive public health impact. In particular, there is evidence that not only do these products help many smokers quit smoking, but more generally, they increase population interest in smoking cessation, enhance levels of motivation to quit smoking, and lead to increased quit attempts among current smokers.

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