I'm an investor in a number of biotech companies, partly because of my incredible enthusiasm for the great innovations they will bring.

Don't wallow in failure. Instead, learn from it.

Now we've got that [children's death rate] down to about 5 percent, so we've more than cut it in half, and that's because we're getting vaccines out, economic improvement also helps there, but the vaccines are why we've seen an acceleration in getting that down.

We're very enthused about the idea that in the third trimester we actually give the mother a vaccine and her antibodies, the protective things that the immune system makes, actually pass through to the baby, both when the baby is born, and through the mother's milk. Because the baby's immune system is actually not very strong for that first few months, using the mother's immune system to do this - it's a very exciting idea and something that we're investing heavily in.

I'm certainly well taken care of in terms of food and clothes.

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

Paul and I, we never thought that we would make much money out of the thing. We just loved writing software.