5 Pharmaceutical and biological preparations for use in oncology, immune-oncology, neurology, infectious diseases, and genetic diseases and disorders; Pharmaceutical and biological preparations for preventing, managing and treating cancer, infectious diseases, and metabolic, fibrotic, immune, and neurological diseases and disorders; biological preparations in the nature of biological components, namely, engineered exosomes used for the delivery of therapeutic agents to targeted cells and tissues within the human body; biological preparations in the nature of biological components, namely, engineered exosomes being a component in therapeutic preparations for use in cancer, infectious diseases, metabolic, fibrotic, immune, and neurological diseases and disorders