The world is full of miserable places. One way of living comfortably is not to think about them or, when you do, to send money

The biggest public health challenge is rebuilding health systems. In other words, if you look at cholera or maternal mortality or tuberculosis in Haiti, they're major problems in Haiti, but the biggest problem is rebuilding systems.

I've been impressed, over the last 15 years, with how often the somewhat conspiratorial comments of Haitian villagers have been proven to be correct when the historical record is probed carefully.

I'm one of six kids, and the eight of us lived for over a decade in either a bus or a boat.

If I am hungry, that is a material problem; if someone else is hungry, that is a spiritual problem.

The idea that some lives matter less is the root of all that is wrong with the world.

I think we will see better vaccines within the next 15 years, but I'm not a scientist and am focused on the short-term - what will happen in the interim.