Leukopak is an enriched leukapheresis-derived product containing concentrations of peripheral blood mononuclear cells like T cells, B cells, and monocytes. The cells are the critical raw material in immunotherapy research and optimizing cell therapy process development before progressing to full clinical manufacture. However, fresh Leukopaks can be difficult to access and must be used rapidly to avoid cell degradation. Lonza has launched customizable cryopreserved Leukopaks. The Leukopaks are available in a range of sizes, including packs of 2.5, 5, and 9.5 billion cells, which can be subdivided into separate bags if needed. The Leukopaks were designed to allow global shipping while maintaining cell viability and functionality.