Growing up on a farm taught me a reverence for all forms of life. We were a large and poor farm family, so that meant that we had to kill and eat our animal friends. When you do that you are aware of the sacrifice that someone is making so that you may live. My mother always made sure we were thankful for those precious gifts.

With regard to the alternatives, we already have them. The cellular and genetic lines of research in humans are the most promising. AIDS is caused by a virus, so it makes sense to study the virus, not chimpanzees. We have learned virtually nothing about AIDS from the chimpanzee. Every major advance in AIDS research ... has come from human studies.