KLH Ab responses are unaffected by LTβR-Ig treatment. Serum was collected from primates immunized with KLH in IFA at day 7 (white bars), 14 (gray bars), and 20 (black bars) and subjected to ELISA to determine relative titers of anti-KLH Ab’s. Titers were normalized over preimmunized anti-KLH levels for each animal, which typically ranged from 1 to 50. The data from both 10 mg/kg intravenous and 10 mg/kg subcutaneous immunization routes were combined, and the number of animals in each group was at least ten. Error bars represent SEM.