Summary of CDC 1992 classification system for HIV disease

Group I        Primary HIV
Group II     Asymptomatic infection
Group III    Persistent generalised lymphadenopathy
Group IV     Symptomatic infection
Group IVA   HIV wasting syndrome (AIDS) and constitutional disease
Group IVB   HIV encephalopathy (AIDS) and neurological disease
Group IVC1 Major opportunistic infections specified as AIDSdefining
Group IVC2 Minor opportunistic infections
Group IVD  Cancers specified as AIDS-defining
Group IVE   Other conditions