Some links in post 43 may help...
It doesn't make sense, no matter what the links say, that dirty medical needles are causing the aids epidemic. Think about it. They're third world countries. Access to medical care of any kind is limited in some places - yet the rates are just as high in those places.
Look also along the Congo River at areas where there are prostitutes. Sky high rates.
If the STD rate is so high - and it is! - why is it that STDs are being transmitted but not HIV?