In their to this response, the authors of the study clarify their reasoning for attacking the cigarette companies, even though they merely complied with the law:

I will address each of these two provisions of the deeming regulations, showing why they represent a devastating blow to the public's health and a huge gift for combustible cigarettes and in turn, for cigarette-related disease and death.

Nevertheless, this does not stop the authors from drawing a conclusion. They conclude, despite their acknowledged inability to draw such a conclusion, that: "e-cigarette use is aggravating rather than ameliorating the tobacco epidemic among youths."

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.

And why did the FDA require Pfizer to warn doctors that patients taking the drug should be "observed for neuropsychiatric symptoms including changes in behavior, hostility, agitation, depressed mood, and suicide-related events, including ideation, behavior, and attempted suicide ... as well as worsening of pre-existing psychiatric illness and completed suicide."

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