Water and sanitation has not had the same kind of champion that global health, and even education, have had.

The water issue is critically related to climate change. People say that carbon is the currency of climate change. Water is the teeth.

One of the most important things about leadership is that you have to have the kind of humility that will allow you to be coached.

One of the things I had to really work on is, when you're the leader of an organization, people look at the expression on your face. Your mood has a lot to do with how people think the whole organization is doing.

What I learned from my work as a physician is that even with the most complicated patients, the most complicated problems, you've got to look hard to find every piece of data and evidence that you can to improve your decision-making. Medicine has taught me to be very much evidence-based and data-driven in making decisions.

I've always been engaged in social protection programmes.