Transfer factor is not an immunosuppressant, it is an immune enhancer. Transfer factor can enhance the cellular and humoral immune function of patients, it is a kind of immune enhancer. The drug contains amino acids, polypeptides, polynucleotides and other substances extracted from the spleen of animals, which can be used for the treatment of diseases caused by pathogens such as viruses, fungi and other pathogens, immune-deficiency diseases such as thrombocytopenia, eczema and other malignant tumors such as osteosarcoma and nasopharyngeal carcinoma. Transfer Factor is available in a variety of pharmaceutical dosage forms such as oral solution, capsule and injection. It is contraindicated in patients who are allergic to the components of the drug, and caution should be exercised in the treatment of pregnant and lactating women with the use of the drug. Currently, the relevant experiments and data do not show any adverse reactions to the drug. Do not use the drug if its properties have changed. The drug should be used under the guidance of a physician, and it is recommended that patients who need to use transfer factors for treatment consult the relevant departments of regular hospitals.