The Center for Disease Control started out as the malaria war control board based in Atlanta. Partly because the head of Coke had some people out to his plantation and they got infected with malaria, and partly cause all the military recruits were coming down and having a higher fatality rate from malaria while training than in the field.

As for drugs - well, Gates was certainly not unusual there. Marijuana was the pharmaceutical of choice.

I think if you talk to the experts in any field where you have to take on a unknown challenge, where you're going to be working on it for a long time you'd find that to work themselves up to their best performance and really throw themselves into it, you know, spend all these hours in there and ah, give it their... give it their best that optimism plays a role.

The media covers what’s new – and millions of people dying is nothing new. So it stays in the background, where it’s easier to ignore. But even when we do see it or read about it, it’s difficult to keep our eyes on the problem. It’s hard to look at suffering if the situation is so complex that we don’t know how to help. And so we look away.

We need to start thinking about the future of food if we are going to feed 9 billion people in a way that does not destroy our environment.

The general idea of the rich helping the poor, I think, is important. That your sense of justice says, why should rich kids - who barely get these diseases and almost never die of them - why should they get the vaccines, when poor kids, who actually do die from these diseases, don't get those things? It's an unbelievable inequity that there isn't that access.

The machines need to get faster. They need to get cheaper.