"“There’s so much we don’t yet know about e-cigarettes,” said Douglas Tipperman, M.S.W., a public health advisor at SAMHSA. “They are not harmless. We don’t know the health impact at the individual or the population level.”

The study is notable because it found that even among dual users, there was a substantial improvement in respiratory health symptoms and a significant increase in several measures of acute lung function, especially small airways flow rates. Thus, the results of this study suggest that dual use of cigarettes and electronic cigarettes might result in respiratory health improvement if the reduction in cigarette use is dramatic, as it was among the dual users in this study.

Just like the topic of sex education was changed forever when people started talking about preventing diseases and unwanted births by using condoms and birth control, the topic of smoking is also changing with new discussionsabout tobacco harm reduction instead ofjust talking about tobacco abstinence.

The study reports that at one year follow-up, the rate of smoking cessation among the baseline non-e-cigarette users was 13.8%, compared to 10.2% for the 88 electronic cigarette users, a difference that was not statistically significant. On this basis, the study concludes that electronic cigarettes are not effective for smoking cessation.

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