Bull!!! You can't even play a biologist well. It mitigates the infection, it does not deter it. The sickling effect is suspected to have ill effects on the infectious entity.
Deters and mitigates are about the same thing.
The survival of the population is advanced by enough percentage points to allow what would normally be considered a disadvantage to an advantage.
The question is, do you have an analysis of sickle cell that demonstrates conclusively that it is deleterious to populations that live in malaria zones? Would you care to share the numbers with us, or just snipe.
I happen to think you are very careful and observant with your posts, but you don't contribute much beside sniping. I would love to see you post something straightforward rather than snide.