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.

Philanthropy should be taking much bigger risks that business. If these are easy problems, business and government can come in and solve them.

I know there's a farmer out there somewhere who never wants a PC and that's fine with me.

We're all responsible for creating a polio-free world while we still can.

Melinda [Gates] has been my partner in raising the kids and I went from before I met her, intentionally having an unbalanced life, to having a more balanced life with all sorts of fun things that she and I do together.

Even with cameras being very cheap, one thing that researchers noticed was that you look really bad in a videoconference image because the lighting is bad and you get shadows and things.

In my parents I saw a model where they were really always communicating, doing things together. They were really kind of a team. I wanted some of that magic myself.