Axenis is a service company using humanized mouse models as preclinical models in immunology, for the pharmaceutical industry, biotechnology companies and public research. The humanized mice are immunocompromised mice grafted with human blood cells for the generation of a human immune system. The creation of chimeric mice carrying human tissue is an essential tool in the development of effective vaccines (prophylactic or therapeutic), drugs against human’s pathogens and preclinical models in oncology. Performing animal tests on mice with human-like immune system is likely to yield results that will more reliably predict human responses as compared to those obtained using “standard” rodent models. Axenis has also positioned itself to answer the unmet need for better predictors of early toxicology. Again, many phamaceutical agents have complications related to immunosuppression or inhibition of hematopoesis.