You are indebted to life until you help some less fortunate person, just as you were helped.

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."

I went to business school, and I went straight from that to a nine-year career at Microsoft. Eventually, I ran a big chunk of the consumer products division for Microsoft.Then I left with the birth of our first daughter because Bill and I both wanted to have a few kids.

With economic opportunity, sometimes it's making sure that if they're not in a place where they can have good jobs, that when they have economic opportunity, they have digital tools to use.

Take time to learn about the lives of women around the world-and try to play a small part in their fight to create the future they deserve.

In the developing world, it's about time that women are on the agenda. For instance, 80 percent of small-subsistence farmers in sub-Saharan Africa are women, and yet all the programs in the past were predominantly focused on men.

If we're going to make progress on this issue [of contraception], we have to be really clear about what our agenda is. We're not talking about abortion. We're not talking about population control. What I'm talking about is giving women the power to save their lives, to save their children's lives and to give their families the best possible future.