since the detection of antibodies against the human immune deficiency virus ( hiv ) does not definitely prove hiv infection in hemophiliacs , virus detection was attempted by virus isolation from the peripheral blood monocytes ( pbl ) , by demonstration of p24 antigen and decline of p24 antibody , and by detection of viral dna by the polymerase chain reaction ( pcr ) .
C0021051
immune deficiency
C0019693
hiv infection