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why the frequency of sickle cell trait is so much higher in sub-Saharan Africa than in most other parts of the world?
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why the frequency of sickle cell trait is so much higher in sub-Saharan Africa than in most other parts of the world?

User Jack Leow
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because they have less resources to fight off disease and nothing to use for immunity. Sub Sahara Africa is also very poor
User Anthony Budd
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