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.

a. Classic tobacco

In fact, this is precisely the way some are interpreting these findings. One on the study is entitled: "Think smoking outdoors always protects others? This study suggests not."

Many tobacco control advocates have asked me why, as a harm reduction supporter, I am always talking about the use of electronic cigarettes to help people quit smoking, rather than the use of smokeless tobacco products.

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