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No one I know -- including me -- claims that an individual e-cigarette delivers more toxins than an individual conventional cigarette.
The point is that assertions commonly made in e-cig promotions that the vapor only includes "pure nicotine" and that exhaled e-cig vapor is just "harmless water vapor" are not correct.
As far as whether e-cigs are an effective strategy for reducing harm, that will depend on whether there is high levels of dual use (which all studies to date have observed), which obviates most or all of the benefit of the fact that an individual e-cig is less toxic as well as whether or not e-cigs deter cessation.

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