What Exactly Does The Immune System Do? The immune system is an amazing blessing to all humans. It allows the ability to ward off and fight against infections that might otherwise kill us. When we take a deep dive into standard medicine and how it looks at the human body we can begin to see the difference in underlying conditions related to individuals across the nation. There is certainly a clear reason why so many women today are riddled with diseases and can’t seem to get to the root of their underlying conditions that started their disease in the first place. The