Instead, I think that studies which specifically compare lung cancer risk between lifelong smokers of filtered vs. non-filtered cigarettes during the same time period are most informative regarding the relative cancer risks of these products. And multiple studies along these lines, including recent studies, have reported a slightly decreased risk associated with lifetime smoking of filtered vs. non-filtered cigarettes.

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Fortunately, the vast majority of the public appears to have better scientific judgment than the FDA and to recognize that cigarette smoking is far more hazardous than the use of an electronic nicotine delivery system that merely aerosolizes nicotine from a propylene glycol solution that is completely free of any tobacco or any combustion.

Even if e-cigarette vapor shows some toxicity in cell culture studies, how does that demonstrate that vaping is more harmful than smoking?

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