In other words, this study did not estimate quit rates among smokers trying to quit using e-cigarettes. Instead, it estimated quit rates among many smokers who were not using e-cigarettes in their quit attempt at all!

The rest of the story is that this assertion by the FDA - that cigarette smoking may be no more hazardous than vaping - appears to be more politically-based than science-based. President Obama, in his inaugural address, called for a return of science to public policy. He asked that science be restored to its rightful place. However, the assertion that cigarette smoking is not known to be any more harmful than inhaling the aerosol produced by heating a solution of nicotine and propylene glycol is hardly something that can be viewed as science-based. Especially when e-cigarette vapor has been extensively characterized and shown to be far less toxic than cigarette smoke.

Hartge et al. exactly the same result as Wynder's group: "Our data indicated that people who have only smoked unfiltered cigarettes have higher risks."

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