forty children born to mothers seropositive for the human immunodeficiency virus type 1 ( hiv-1 ) followed-up to 15 months after birth were studied by means of serum antibody patterns to individual viral polypeptides , by the presence of detectable levels of viral core antigen ( p24 ) and virus in serum and peripheral blood lymphocytes , and by total lymphocyte counts and t4/t8 lymphocyte ratios .
C0008059
children
C0027361
individual