PRIOR CONCURRENT THERAPY: Biologic therapy: No other concurrent antibody therapy during or after study No other concurrent immunotherapy (e.g., interferons, vaccines, or other cellular products) Chemotherapy: At least 3 weeks since prior standard or experimental chemotherapy and recovered Endocrine therapy: No concurrent systemic corticosteroids unless specifically for amelioration of toxicity induced by transferred T-cell therapy Radiotherapy: Not specified Surgery: Not specified Other: At least 3 weeks since prior immunosuppressive therapies and recovered No concurrent pentoxifylline No other concurrent investigational agents No concurrent ganciclovir, any ganciclovir derivatives, or acyclovir for non-life-threatening herpes virus infections