The CDC's statement is wrong on its face. If there is reputable evidence from former smokers that e-cigarettes helped them quit smoking, then there is indeed conclusive scientific evidence that e-cigarettes "can work" as a cessation aid.

Presumably, these five studies examined the rate of quitting among smokers who used electronic cigarettes in an attempt to quit smoking.

And Dr. Terry failed to stop the study in 1965, even after the 1964 World Health Organization's Helsinki Declaration clearly articulated the ethical imperative of informed consent for human medical experimentation.

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