Thirty-six patients with Stage II malignant melanoma were randomized to no further therapy or transfer factor (TF) following surgical removal of all evident disease. Eighteen patients received TF, and 18 were in the surgery only group. Median disease-free intervals were 12.0 and 10.0 months, and survival, 40.8 and 27.0 months, respectively. Nine TF patients and four control patients remain alive. These differences were not statistically significant, and no adjuvant effect of TF could be demonstrated.