Some very poor countries run great vaccination systems, and some richer ones run terrible programs.

[Melinda Gates] is a lot of fun to work with. There's some of the people skills that she's better at and cares about more. It'd be a mistake not to think of her as very numerical and interested in the science. I enjoy, if I get ahead of her, say, understanding the immune system, then we can spend a few hours, where I'm going through how amazing it is and interesting, and how that affects our creating new products, so I've always had a partner.

Two out of every five people on Earth today owe their lives to the higher crop outputs that fertilizer has made possible.

Today, we take the risk of nuclear war quite seriously, climate change not so much and epidemics least of all. But no single country, not even the United States, is well prepared. And even if one country is doing the right things to protect itself, it has to be a global thing.

I would certainly use my voice to try and avoid anything that undermines confidence, so that parents are using vaccines fully.

You’ve got to give great tools to small teams. Pick good people, use small teams and give them great tools so that they are very productive in terms of what they are doing.

If your business is not on the Internet, then your business will be out of business.