High-quality, high-viability (> 90%) peripheral blood mononuclear cells (PBMCs) from healthy blood donors sourced from a world-renowned blood center. Used for a wide variety of immunology-based applications, including in-vitro immunoassays and ex-vivo applications. All orders come with an iQ Certificate of Analysis.The following donor requests can be accommodated if inventory is available: - Single or multiple donors for a particular product (SKU). Indicate the number of vials from each individual donor - Positive or negative for EBV or CMV (for healthy donors only) - Good responder or non-responder to tetanus antibody (for healthy donors only) - HLA types for Class I and Class II alleles (for healthy donors only) - Donor(s) with a higher percentage of the cells of interest (e.g., B cells, CD4+ cells, CD8+ cells, NK cells, etc.) - Gender, age, body mass index (BMI), or ethnicity