It is sometimes possible to re-create some of the symptoms of a disease but never the disease itself. The exception to this fact is the case of infectious diseases. However, animals do not get human infectious diseases and we do not get theirs. Obviously, prevention is the ideal situation. Once disease has occurred, however, the only hope for a successful treatment and possible cure is clinical research, or the observation of human beings who have naturally occurring diseases.
Clinical research is the only way to get valid answers.
Tragically, we keep financing experimental research to the almost total exclusion of prevention and clinical research. Animals are totally different from man and from each other genetically, histologically, anatomically, physiologically, immunologically, emotionally, psychologically, sexually and socially. It is clear that human medicine cannot be based on veterinary medicine. Animals react differently to drugs, vaccines and other chemicals not only from man, but also from each other. Hence the incalculable damage to human health caused by pharmaceutical drugs and vaccines.