The worst potential bio-terrorist is nature itself.

Certainly the support for research in HIV/AIDS was good in the Clinton administration, good in the Bush administrations. It just was.

When I was a child, there were not that many vaccines. I was vaccinated for polio. I actually got measles as a child. I got pertussis, whooping cough. I remember that very well.

A pandemic influenza would mean widespread infection essentially throughout every region of the world.

We feel confident that there won't be an outbreak. The people who were around the patient are now being identified and traced by the CDC and by the state health authorities. ... you get people, you identify them, and you observe and monitor them daily to determine if they develop symptoms If they do, then you put them under isolation to determine if, in fact, they are infected. And if you do that properly, you can shut down any outbreak.

You help someone's health, and you prevent them from infecting others.

The nature of a protective immune response to HIV is still unclear. Because in a very, very unique manner, unlike virtually any other microbe with which we're familiar, the HIV virus has evolved in a way that the immune system finds it very difficult, if not impossible, to deal with the virus.