a limiting-dilution analysis technique was developed which enumerates human t cells with the capacity to secrete t-cell growth factors such as interleukin 2 after contact with herpes simplex virus type 1 ( hsv-1 ) or cytomegalovirus ( cmv ) antigens ( operationally defined as virus-reactive helper t cells [ htl ] ) .
C0021758
t-cell growth factors
C0021764
interleukin