This is a very biased book, and I want to believe it, so I'm dubious. But, given that I can't find any well researched argument supporting the idea that animals are adequate models for human disease, I am inclined to agree with it for now.
The chapter on organ donation (can an animal "donate" an organ?) seemed like a bunch of alarmist speculation, but that may just be my unhealthy lack of concern for viruses. And the focus on education, prevention and policy change mostly made up for it anyway.
This book also changed my mind about carcinogenics in food and personal care products.