Well, funding global health care systems certainly is complicated, but we do have the machinery in place to help with that. The World Health Organization and other bodies of the United Nations are there with the explicit mandate to support coherent strategies. The African Union has provided important leadership on this.
It is true that every country has particular circumstances, a particular culture or context, and that they need to respond to their reality. But the numbers of things that are similar are much greater than the numbers of things that are different, in many ways. So this is not something where you need experimentation because we don't know how to do it. We know what we need to do here, and the experimentation is around how to do it even better, how to customize it here, and how to reach that most difficult to reach group there.
But this is much less complicated than some other issues we're dealing with right now. It's about the volume of funding and commitment of resources.