(See: Brown J, Beard E, Kotz D, Michie S, West R. Real-world effectiveness of e-cigarettes when used to aid smoking cessation: a cross-sectional population study. Addiction. .)

A issued by UC Riverside states unequivocally that this research finds thirdhand smoke to be every bit as harmful as active smoking.

In an published today in the Wall Street Journal, I highlight the fact that many legislators and health organizations have demonized electronic cigarettes, largely on the basis of the erroneous conclusion that there is scientific evidence demonstrating that these products are a gateway to cigarette smoking among youth. The piece points out that there actually is no such scientific evidence and in fact, it presents evidence to the contrary.

The study found that: "Neither a brief session of active e-cigarette smoking (indicative: 3% reduction in FEV1/FVC) nor a 1 h passive e-cigarette smoking (indicative: 2.3% reduction in FEV1/FVC) significantly affected the lung function (p > 0.001). In contrast, active (indicative: 7.2% reduction in FEV1/FVC; p < 0.001) but not passive (indicative: 3.4% reduction in FEV1/FVC; p = 0.005) tobacco cigarette smoking undermined lung function."

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