CD4 and Kaposi's sarcoma: Furthermore, the detection range of this platform (19 to 250 particles/μL in 10×-diluted blood) corresponds to 190 to 2500 cells/μL in undiluted whole blood, which encompasses clinically relevant levels of CD4+ T cells in healthy individuals (430–1740 cells/μL)39,40, persons infected with HIV who are undergoing ART ( ≤ 350 cells/μL)41 and individuals with an increased risk of non-AIDS defining cancers (350–499 cells/μL), including Kaposi’s sarcoma and non-Hodgkin lymphoma6.