The USA is a police state where gun deaths exceed the rest of the civilized world combined.
The gun homicide rate per 100,000 is 3.43 in the US, and 37.16 in swaziland. We have a big population in the US, of course we're going to have more of lots of things. But in terms of disease, violence, and vulnerability to official corruption, the US is way ahead of africa as a whole.
It's like 4 times above South Africa which would be my guess for "highest gun homicide per capita" rate in Africa.
There's simply no way this is even close to a continent wide average.