The BD FACSCount™ system is a proven, turnkey system designed to provide absolute and percentage results of CD4 T lymphocytes to stage progression of HIV/AIDS, to guide treatment decisions for HIV-infected persons, and to evaluate effectiveness of therapy in a wide range of laboratory settings. As the system of choice for CD4 monitoring in global HIV/AIDS treatment programs for over a decade, the BD FACSCount system is recognized for its simplicity of operation, robust performance, and reliable results