4. Those products are menthol-flavored cigarettes.

In fact, there are literally thousands of testimonials from ex-smokers as well as thousands of identified ex-smokers in surveys who testify that for them, e-cigarettes did work as a cessation aid. There is no legitimate scientific debate over whether e-cigarettes can work as a cessation aid. They can work, and they have worked for literally thousands of smokers.

The authors of this study make one of the most cardinal errors in all of epidemiology. They ignore the principle that "correlation does not equal causation."

Instead, these were all population-based studies of smoking and e-cigarette use that did not even ask smokers using e-cigarettes if they were using them regularly or if they were using them in an effort to quit smoking. Actually, one of the studies did ask smokers if they were using e-cigarettes to quit smoking and the overwhelming majority said that they were not. In other words, many of the smokers in this study were probably just experimenting with, or trying an e-cigarette, and were not regular users of these products.

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