It’s been proven that of all the interventions to reduce poverty, improving agricultural productivity is the best.

Vaccination is pretty special because you can do a vaccination campaign anywhere in the world. All you are doing is gathering women from the villages, getting them the vaccines and asking them to go around and find the children.

Windows 95 was a nice milestone.

Money has no utility to me beyond a certain point.

Polio's pretty special because once you get an eradication, you no longer have to spend money on it; it's just there as a gift for the rest of time.

The idea of explaining why free trade is good, why immigration is good, why the world is so connected, that we need to think in terms of humanity and being generous to each other, you know, that's proving to be a challenge.

Ninety percent of the cases of polio are in security-vulnerable areas.