Transfer factors are produced by lymphocytes with cell-mediated immunity function. They carry the parent lymphocyte’s antigen-specific cell-mediated immunity (delayed-type hypersensitivity) to unsensitized, or naive, lymphocytes. They can also increase the nonantigen-specific immunostimulatory activity of the recipient lymphocytes.

Transfer factors transfer immunity information—recognition of pathogens and appropriate immune response—with inducer, suppressor and antigen-specific factors.

• The inducer factor allows transfer factor to aid the adaptive immune response to viral infections, parasites, malignancies, bacterial and mycobacterial disease, fungal infection, autoimmune disorders and neurological disease. This factor can transfer an immune response in under 24 hours and significantly reduce or eliminate symptoms of illness.
   
• The suppressor factor keeps the immune system from over-responding, such as to pollens and other foreign bodies, as well as to itself as in the case of an autoimmune disorder.
   
• The antigen-specific factor carries critical tags that the immune system uses to identify foreign microbes and cells.

Transfer factors are found in even the most primitive immune systems. As such, transfer factors’ inducer and suppressor factors are universal and can transfer immunity across species barriers. Hence, transfer factors from a cow can confer immunity in a human. The antigen-specific factor can transfer immunity between species when crossover occurs between antigen-specific pathogens, such as in smallpox and cowpox, E. coli, etc.

Transfer factor teaches our immune system to recognize and attack foreign threats in our bodies. It also suppresses our immune system should it over-responds. Therefore, transfer factor helps our immune system achieve a healthy and optimum level of immunity.