We see new things all the time. We see new retroviruses out there - which is the category that HIV falls into - and we're very, very concerned because this is the part of the world where HIV jumped from chimpanzees to humans.

See any detour as an opportunity to experience new things.

The reality is: By the time swine flu got on the radar screen of global public health, it had already spread. It was already in the States, it was in Mexico, it was in New Zealand. By the time it reaches that point, you've lost the ability to contain it.

Swine flu is not an anomaly. We know that swine flu - like the vast majority of new outbreaks - comes from animals. We should be monitoring those animals and the humans that come into contact with them, so we can catch these viruses early, before they infect major cities and spread throughout the world.

We live in a world fraught with risk from new pandemics. Fortunately, we also now live in an era with the tools to build a global immune system.

I like to discover new things.