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

The immune systems goal is to protect the body against invaders either from without, such as microbes, or from within, such as cancers and different types of neoplastic transformation.

Staph lives on skin. Thats the reason why many infections start as a boil.

What has happened over the years is that scientists have now developed AIDS therapeutic capabilities, as well as prevention, and we've linked prevention and treatment in a way that if you fast-forward 30 years form '88 to now, we can say without hyperbole that we have the tools, if implemented the way they could be implemented, to theoretically, essentially end the epidemic as we know it now.

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.

Activism has been very productive in our society.

Although it is still important to develop an HIV vaccine, we have significant tools already at our disposal that can make a major impact on the trajectory of this epidemic.