When you put someone on therapy, you lower the level of virus such that it makes it very difficult for them to infect others.

Investigating rare diseases gives researchers more clues about how the healthy immune system functions.

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 dont have to vaccinate every man, woman and child in the country if you have a couple of cases of smallpox cropping up.

Activism has been very productive in our society.

I think, collectively, we should be paying more attention to what is going on around us in the world among people who dont have the advantages that we have.

There has been treatment for hepatitis C, but the treatment has not been overwhelmingly effective, number 1. And number 2, it has had considerable toxicity.