Yeah this one takes some believing but it seems possible to me..
while I was in SA last year a local was telling me how the black population will mostly consist of middle class white collar workers in 10 years due to AIDS being endemic among the higher and lower classes due to their lifestyle. (middle classes tend to be more reserved the world over)
Its a real problem as this disease is mostly wiping out the poor low class workers who make up the bulk of the working population that SA relies on.
Also Zimbabwe has got one of the highest AIDS infection rates going on the continent, as if things aren`t bad enough for them.
Phil J