Are only special animals used for human medicine?

No, not only special animals are used for human medicine. A wide variety of animals, including common laboratory animals like mice, rats, rabbits, etc., are frequently used in preclinical studies and research to better understand human diseases and treatments. However, certain species may be preferred for specific purposes due to their genetic similarities to humans, organ structures, physiological responses, or disease susceptibility. Some non-human primates (NHPs) and genetically modified or transgenic animals may be used when studying particular diseases or testing therapies relevant to humans. The selection of appropriate animal models depends on scientific and ethical considerations.