People everywhere love Windows.

If you get health, then you have opportunity for literacy. Health first, then literacy. Once you have literacy, then you have a chance to bring in the new tools of communication. Let people reach out and have access to the latest advances.

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

The nuclear approach I'm involved in is called a traveling-wave reactor, which uses waste uranium for fuel. There's a lot of things that have to go right for that dream to come true - many decades of building demo plants, proving the economics are right. But if it does, you could have cheaper energy with no CO2 emissions.

Everyone needs a coach. It doesn't matter whether you're a basketball player, a tennis player, a gymnast or a bridge player.

Whether you believe it a moral imperative or in the rich world's enlightened self-interest, securing the conditions that will lead to a healthy, prosperous future for everyone is a goal I believe we all share.

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