Transfer Factor Oral Liquid is a kind of immunity-enhancing drug, the specific price can not be generalized, according to the size of the city and the level of the hospital slightly different. Usually, the price of transfer factor oral solution per box of 20 is relatively expensive in provincial capitals and tertiary hospitals, ranging from 28.9-32.5 yuan. In second-tier cities and Grade 3B and Grade 2A hospitals, the price of Transfer Factor Oral Liquid is relatively cheaper, usually ranging from RMB 18.9-25.5. The price of Transfer Factor Oral Liquid is the cheapest in third-tier cities and third-class C hospitals, usually ranging from$15.8-19.7, depending on the manufacturer, the price is slightly different.