to determine the usefulness of dna amplification by polymerase chain reaction for the early identification of human immunodeficiency virus type 1 ( hiv-1 ) infection in infants and children , we compared the polymerase chain reaction and concurrent viral cultures of peripheral blood mononuclear cells from 25 high-risk subjects aged 5 weeks to 8 years .
C0021270
infants
C0008059
children