Dr. Aaron White is a neuroscientist with an interest in how the brain and immune system interact and how to improve the health of both.  I just finished his book titled, Transfer Factors and Immune System Health.  In it, he delves into research that started in 1949 with an American Immunologist H. Sherwood Lawrence and the discovery he could transfer immunity to tuberculosis from ill patients to healthy ones using an extract from the ill patients’ white blood cells.  He called the mystery component of the extract- transfer factor.  In the past 50 years, there have been a 1000 studies and 600 of those examined the therapeutic value of transfer factors in disease treatment and prevention.  Essentially transfer factors represent a unique type of messenger used for cell to cell communication in the immune system.  Some people theorize that the Transfer Factors evolved as a way of compensating for the immune system’s slow circulatory response to foreign substances.  It takes time to react to all the different viruses, bacteria and fungi that we are exposed to. 

If all of this sounds like immunizations, you would be correct. However...