Immune experience is able to be transferred from one organism to another, along with the information that a particular body has accumulated a variety of viruses and microbes, with whom he came in contact, and fought throughout its existence. Bearers of this "immune memory" are molecules consisting of 44 amino acids. These molecules gave the name of transfer factors. The first and primary function of the drug is to strengthen the immune response in cases of immunodeficiency sostoyaniya..Unikalnost this drug lies in the fact that it is not a product of the chemical industry. It was created by Mother Nature itself. This explains the high efficiency of transfer factor and absolute safety.