The most important 'speed' issue is often not technical but cultural. It's convincing everyone that the company's survival depends on everyone moving as fast as possible.

The next time someone tells you we can trim the budget by cutting aid, I hope you will ask whether it will come at the cost of more people dying.

Well the Global Fund, because of how well it's worked on not only AIDS, but also malaria and tuberculosis, I'd say it's well accepted. I mean, it's not politically controversial that this is a great humanitarian effort. But budgets are very very tight.

When you are failing, you are forced to be creative, to dig deep and think, night and day.

Whenever you have a few setbacks, the idea that half as many children are dying now as back in 1990 and so... it was over 12 million a year, now it's less than 6 million a year. We have a clear path to get that under 3 million a year and we know what to do. And this generation of young Africans is a very large group.

I don't think I would have spent time learning about the immune system if understanding vaccines weren't something I considered very important.

In low-income countries, getting to a health post is hard. It's very expensive.