Table 7.

Clinical Staging of HIV Infection (39)a

HIV STAGEDEFINITION
 1No immunosuppression (based on CD4 values) and no history of AIDS-defining illness
 2Moderate immunosuppression (based on CD4 values) and no history of AIDS-defining illness
 3Severe immunosuppression (based on CD4 values) or history of AIDS-defining illness
  • HIV=human immunodeficiency virus.

  • a Until 2014, CD4-based immunosuppression (none, moderate, severe) was categorized separately from a clinical staging in children (<13 years old): N, no signs or symptoms; A, mild signs or symptoms; B, moderate signs or symptoms; C, severe, AIDS-defining illness.(40)