PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No concurrent chemotherapy Endocrine therapy: No corticosteroids during the interval between 1 week prior to each immunization through 2 weeks after each immunization Radiotherapy: No concurrent radiotherapy Surgery: Not specified Other: No antiinflammatory agents (e.g., aspirin) or other nonsteroidal antiinflammatory drugs during the interval between 1 week prior to each immunization through 2 weeks after each immunization