There is a mutation, CCR5 delta 32, which provides the bearer with immunity against most HIV strains. The downside of the mutation is that it lessens the bearer's resistance to a class of viruses called flaviviruses. These viruses include Zika, dengue, yellow fever and west Nile.
All in all, I'd rather be resistant to the whole host of encephalitis viruses than HIV. Safe sex is easier to do than avoiding mosquitoes.
See wikipedia for more information.
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