in order to investigate the possible role of immunity in lower respiratory tract disease of infants produced by respiratory syncytial ( rs ) virus , 18 hospitalized infants were tested for cell-mediated immune ( cmi ) responses in a whole blood culture assay utilizing a gamma emitting tracer , 5 ( 125i ) iodo-2'-deoxyuridine [ 125iudr ] to quantitate cellular proliferative responses to virus antigen .
C0020964
immunity
C0003320
antigen