Bill and I both firmly believe that even the most difficult global health problems can be solved.

All of a sudden people in the United States start to realize that vaccines make a difference. The controversy and the myth that's there, we're always trying to bust through that. So when I see a disease outbreak, I say to myself, "OK, that'll get people realizing how lucky we are to have vaccines."

It's really one of my all-time favorite things to do. To go out and really see the kids and visit the moms who are in these programs because I think I really get to see what happens on the ground and connect with them about what changes are that happen in their lives because of some of the giving that we're able to do.

Connect deeply with others. Our humanity is the one thing that we all have in common.

We started our foundation because we believe we have a real opportunity to help advance equity around the world, to help make sure that, no matter where a person is born, he or she has the chance to live a healthy, productive life.

But iPods and iPhones are two things we don't get for our kids.

If you don't invest in the woman, empower her, give her the things she needs to lift her family up, you're just not going to make the progress that you want to make. But if you put her at the centre, you can change a lot for that family, and it has ripple effects through the economy.