Although it is almost eliminated in rich countries, it's still one of the biggest killers worldwide. This is a very tough disease.

Rich countries can afford to overpay for things.

Some very poor countries run great vaccination systems, and some richer ones run terrible programs.

Like almost everyone who uses e-mail, I receive a ton of spam every day. Much of it offers to help me get out of debt or get rich quick. It would be funny if it weren't so exciting.

Our services have started out as very inexpensive but not feature-rich, ... Our servers are very feature-rich. So as we bring these things together, we give you the richness and also the choice of having it as server or as a service.

I think when smallpox was eliminated, the whole world got pretty excited about that because it's just such a dramatic success.