we followed 214 untreated subjects for 12-42 months to study the natural history of hiv infection : 110 were classified as asymptomatic , 11 as aids-related complex ( arc ) , 15 as aids with kaposi 's sarcoma ( ks ) , 31 as aids with opportunistic infections ( aids/oi ) , and 47 were hiv-seronegative controls .
C0019693
hiv infection
C0001175
aids