Your way of breaking down science is addictive. This is such an interesting read especially the first two answers. I find it very interesting that as deadly as Malaria and HIV are, they can't overwhelm SCD yet hepatitis B & C do.

I think Africa is overwhelmed by HIV & Aids so I usually pray someone finds a cure. Malaria overwhelmed this continent a long time ago.

And thank you for making this clear...

The condition described above is called pseudofolliculitis barbae and is caused by the fact that especially black hair is really curly. It turns and twists which can cause it to bury itself back into the skin.

I have always wondered why its so common among African men! Always fun to read your work :D