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Dead? No.
The most recent (within millions of years) evolution humans have experienced in the mind.
Think of it this way, It used to be better for us to be really hairy. Once we gained the mental capibility to produce/maintain fire, we didn't need as much hair. Therefore a physical trait, like that of a desease, is trumped by a mental trait, like that of the capibility of discovering cures.
Evolution is well alive.
(The analogy may not be exactly precise, but it illustrates my point)
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