The public freaks out when they learn that someone might have spliced a salt resistance gene into a tomato, and you think the public will accept the kind of advanced genetic manipulation you'd need to kill HIV dead?
And every part of Africa uses inventions such as car or gun.
As far as R&D of new treatments, prophylaxis, and cures... I didn't know there were divergent strains with specialized treatments and one that is predominant in only Africa. This saddens me greatly because arriving at a cure will take upwards of $1 trillion USD and companies (even governments) need to have a hope of return on that investment. If (and this is a big IF) curing HIV in America does not actually cure HIV in Africa, then there is no way for the US market to subsidize the rest of the world, and much less likely for a cure for the African strain to ever be created.