This invention provides a method for treating tumors in a subject, comprising administering to the subject an effective amount of a recombinant interferon, wherein the interferon has the amino acid sequence of SEQ ID NO:2 and is encoded by the nucleotide sequence SEQ ID NO:1, wherein the tumors are selected from the group consisting of skin cancer, basal cell carcinoma, liver cancer, thyroid cancer, rhinopharyngeal cancer, solid carcinoma, prostate cancer, esophageal cancer, pancreatic cancer, superficial bladder cancer, hemangioma, epidermoid carcinoma, cervical cancer, glioma, leucocythemia, acute leucocythemia, chronic leucocythemia, lymphadenoma, and polycythemia vera.
