SHR # 2231 :: Vaccines, Autoimmunity and the Changing Nature of Childhood Disease :: Dr. Thomas Cowan - Vaccines work through the process of hormesis. The learned immune system becomes stronger when strategic insults are introduced. But pharmaceutical companies add things to multi-injection vials to make them shelf-stable and to act as adjuvants that are now being shown to be triggering unwanted immune system changes. They weaponize the immune system in ways that the immune system starts to attack the host's tissue. We see this autoimmune response in rheumatoid arthritis, hashimoto's disease, ulcerative colitis and others. Preservatives are included to improve large-scale manufacturing processes and profitability and not the effectiveness of the vaccines. The science between the use of vaccines and how they trigger an inappropriate immune response is detailed clearly by Dr. Cowan. ::