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. 2020 Feb 4;67(1):631. doi: 10.4102/sajcd.v67i1.631

TABLE 2-A1.

CDC classification system for HIV-infected adults and adolescents.

CD4* cell count Clinical categories
A: Asymptomatic Acute HIV or PGL B: Symptomatic Conditions, not A or C C: AIDS-Indicator Conditions
(1) 500 cells/µL A1 B1 C1
(2) 200-499 cells/µL A2 B2 C2
(2) 200 cells/µL A3 B3 C3

Source: Adapted from Centres for Disease Control and Prevention (CDC). (1992). Revised classification system for HIV infection and expanded surveillance case definition for AIDS Among Adolescents and Adults. Retrieved from https://www.who.int/hiv/strategic/en/cdc_1993_hivaids_def.pdf

CD 4*, cluster of differentiation 4+; μL, microliter.