Interferon is a broad-spectrum viral inhibitor that can also inhibit tumor growth. Interferon can be used to treat viral infectious diseases, such as viral hepatitis, shingles, etc.; it can also be applied to the treatment of a variety of tumors, such as chronic leukemia, non-Hodgkin’s lymphoma, etc.; it can also be used as an adjuvant therapeutic agent for post-operative radiotherapy of tumors. 1, inhibition of viruses: interferon has an inhibitory effect on both RNA and DNA viruses, and can prevent the integration of viruses into the DNA of human cells, thus inhibiting The interferon has a significant selective ability to inhibit cell division activity, mainly inhibiting the over-divided tumor cells, the inhibition of normal cells is very weak; 3, immunomodulation: both humoral immunity and cellular immunity play an immunomodulatory role, can also enhance the immune role of macrophages and NK cells; 4, inhibition of tumor cell proliferation: interferon not only It can not only directly inhibit the proliferation of tumor cells, but also indirectly kill tumor cells by regulating human immunity. In addition, it can also induce apoptosis of tumor cells, which can kill tumor cells from several aspects. The side effects of interferon include systemic symptoms such as fever, headache, fatigue, joint pain, muscle pain, etc., and some blood changes such as leukopenia and thrombocytopenia. It can also induce some autoimmune diseases, thyroid function abnormalities, blood sugar abnormalities, fundus changes, etc.