"I think the realistic aspect is that particularly for people who are HIV infected, you cannot right now, with resources that are available, get everyone who needs to be on therapy in the developing world,on therapy.

VOA: standard.2010.07.17

The idea of treating disease by replacing a defective gene with a working copy gained credence in 1990 with the success of the world's first gene therapy clinical tests against a rare condition called severe combined immunodeficiency (SCID).

MSN: European regulators back first gene therapy drug

Last month, the European Union approved Glybera for treatment of a rare genetic disease, making it the first gene-therapy medicine approved in the Western world.

WSJ: The Future of Medicine Is Now: Medical Innovations

Neither fusion inhibitors nor immune therapy are likely to make much impact in the developing world, simply because of cost.

BBC: Aids: The medical progress