[darkocean]

The solution to malaria is called DDT, and not sickle-cell anemia.

[Coyoteman]

The solution to malaria is called DDT, and not sickle-cell anemia.

Perhaps sickle-cell anemia evolved before DDT was invented?

[b_sharp]

"The solution to malaria is called DDT, and not sickle-cell anemia."

Those that become anemic are those with two 'sickle cell' genes. Those with just one 'sickle cell' gene were affected less by the parasite. When this beneficial mutation developed, there was no such thing as DDT.