Sorry! I forgot that the axes were in the surrounding page not in the image.
Vertical is "$/DALY" which is basically the cost-benefit ratio of a medical treatment. $100/DALY would mean $100 to give someone an additional healthy year of life. The horizontal axis is a wide range of developing world medical interventions, lined up from worst cost-per-daly to best. You can see that the very best ones are much better than most of them, though even the "worst" ones are still excellent value for the money both in absolute terms and compared to what additional health spending gets you in rich countries.
Vertical is "$/DALY" which is basically the cost-benefit ratio of a medical treatment. $100/DALY would mean $100 to give someone an additional healthy year of life. The horizontal axis is a wide range of developing world medical interventions, lined up from worst cost-per-daly to best. You can see that the very best ones are much better than most of them, though even the "worst" ones are still excellent value for the money both in absolute terms and compared to what additional health spending gets you in rich countries.