Nigeria: An unsustainable battle?

In 1991, the Nigerian president announced that his country was going to lead the way in Aids treatment. In many respects his government scheme has been successful, but what happens when the money runs out? It is no surprise that those who are getting the subsidised drugs are enormously grateful - whatever the programme's flaws - and those who are not are desperate to join the scheme. So what is the score-card so far?