July 29, 2005 -- You would think that efficacy of a drug would be a simple matter. You give it to a certain number of people, and if a significant percentage of them get better, you have a drug that works. But in the real world of cancer, things are rarely that simple. Cancer is a strange disease. We do not understand it very well: what we think is happening is not what is happening in the real world. We look at why something that seems simple gets so complex, and how our understanding of cancer will have to change before things get better...
