Even in some of our vaccine areas, like an AIDS vaccine, things have taken longer than we expected, but we have the pipeline of tools. The biological information that we have that gives us insights is fantastic.

You can be a business thinker.

I do normal kind of contributions, particularly for people who are going over to Africa and help highlighting global health, and that's tended to be pretty bipartisan in nature because of the coalition there exists fortunately around these global health issues. But I don't think my backing, putting a lot of money into political contributions is a way I'm going to try and help improve the world.

We'll have infinite bandwidth in a decade's time.

On the supply side, for innovation, you'd say, go look at those R&D budgets, and they haven't moved in the last 20 years. In the case of the US - which is the majority of R&D funding across every category you can name: health, energy, whatever - it's been about $5 billion a year from the Department of Energy.

It was really phenomenal [Warren Buffett donation]. It grew out of the friendship that we had and the fact that his plan to have his wife run the foundation and give things away changed when she tragically died.

The billion people who wake up every day trying to figure out if they have enough food to eat won't be at Davos.