As the authors point out: "Of interest, consistent improvements in subjective and objective asthma outcomes were also observed amongst dual users (i.e., heavy reducers) with no real difference in dual compared to single users by the end of the observation period."

What is a defective cigarette, you may ask. Well, according to the FDA, a cigarette that causes lung cancer, heart disease, emphysema, kidney cancer, or leukemia is not defective. Those are cigarettes which are working the way they are supposed to work!

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