There are numbers. Malaria alone costs the African continent $12 billion per year. That's a significant amount. It is not just the direct cost for the treatment for the disease, but the cost of absenteeism. Frequently people in Africa cannot go to work, cannot care for the community, and so on, because they are sick with malaria. That has been documented.
The same applies to tuberculosis, and even more so to AIDS, because it affects the working-age population. It has a tremendous effect on the economy of many countries, particularly in southern Africa. We have good data to prove that while this is a significant investment, the return is much higher than the investment. We invest, let's say, about $1 billion now per year into malaria control, achieving a 50% reduction. I said it costs $12 billion. That's the cost of the disease, so you see that it's a very good return.
You're right; sometimes we have to argue not just in humanitarian terms, but also in economic terms, that this is an investment that makes sense and helps those countries to develop. The entire issue of The Globe and Mail yesterday was about Africa, the future of Africa and the economic potential of Africa. Africa has been growing economically over the last few years, and I think good health contributes to that. It is one of the foundations for socio-economic development in those countries.