"It should be emphasized that neither of these studies was designed to capture a representative sample of all vapers. Instead they focus on the most enthusiastic among them, whom you would expect to have had especially satisfying experiences with e-cigarettes. The high success rates in these surveys therefore are unlikely to be seen among the broader group of smokers who try to quit with e-cigarettes, let alone among smokers who merely try the product out. But these surveys do indicate that e-cigarettes have helped many smokers quit."
"In terms of acute effects on respiratory function, active smoking is exactly equivalent to the effects of taking a math test."
(See: Zhu S-H, et al. Four hundred sixty brands of e-cigarettes and counting: implications for product regulation. Tobacco Control. Published online ahead of print on June 17, 2014.)
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