Land degradation, rising sea levels, famine, and conflict will continue to drive people from their homes and towards cities, with megacities like Mexico City and Lagos becoming increasingly common in some of the poorest parts of the world.

When it comes to providing aid, developing innovations, and making bold steps that change the course of history, the United States is usually on the front lines.

Finding innovative ways to deliver vaccines to children in developing countries is at the heart of our work. The very fact that we don't have people on the ground but rather work in an alliance with other organizations is itself an innovation that was the basis of GAVI's establishment in 2000.

No country in the post-colonial era has thrived without first building its capacity to conduct scientific research.

I do fear God, but I will also tell you that when a doctor diagnoses you and the word 'cancer' comes out of his mouth, at that point, it changes your life and you do fear less and it also has allowed me to be a lot more open as a person. It's changed me.

People get caught up in the idea that health is just what you look like and what you eat, but your health is physical, emotional and mental. Who's to say eating that bowl of ice cream after training isn't going to help me psychologically and emotionally?

Having a sense of humor about yourself is a sign of mental health.

I believe your stomach tells you what it wants, and I don't think mine asks for anything that unhealthy. I'm a trained health machine.