“…On days 0 (30 rain), 1, 2, 3, 4, 5, 7, 10, or 15 after antigen, groups of these animals were treated with CP and anti-SRBC antibody. These agents were chosen to partially remove antigenic stimulus (2,19), and to kill, or halt division of, activated T and B lymphocytes (20,21). Control groups received either antigen (control 2 ° response) or immunosuppressants (control 1 ° response) alone.…”