Science Questions

Why didn't humans evolve through allergies?

Sat, 21st May 2011

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Question

Manal Javid, via facebook asked:

Why didn't humans evolve through allergies?

Answer

Rick -   Well, we evolved to tune our immune system in the presence of different infectious organisms and in a way, allergies have resulted because we’re no longer in the environment in which we evolved.  So I suppose, because allergies are so recent and human population is no longer being selected by natural selection, I don't think we are going to evolve through allergies.

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