PRIOR CONCURRENT THERAPY: Biologic therapy: At least 3 months since prior growth factors At least 3 months since prior agents with putative immunomodulating activity (except nonsteroidal antiinflammatory agents) At least 1 year since other prior melanoma vaccinations Chemotherapy: At least 3 months since prior chemotherapy No concurrent chemotherapy Endocrine therapy: At least 3 months since prior corticosteroids No concurrent corticosteroids Radiotherapy: At least 3 months since prior radiotherapy No concurrent radiotherapy Surgery: See Disease Characteristics Other: At least 3 months since other prior investigational drugs or therapy At least 3 months since prior allergy desensitization injections At least 14 days since completion of acute treatment for a serious infection No concurrent allergy desensitization injections