There are actually many non-surgical treatments to help rebuild the immune system. Drinking eight glasses of water everyday will flush out impurities in the liver and the kidney which helps the immune system to stay healthy. Whole grains, raw vegetables and fruits are needed to maintain a healthy immune system. If you are a smoker, quit as soon as possible. Tobacco and the chemicals in cigarettes breaks down the immune system. Take vitamins every day. Vitamin C is an immune system builder. Vitamin D and E are also a good one to take. Stress plays a big role in a weak immune system. Find ways to relax and get the proper amount of sleep. Having a strong immune system gives your body the ability to fight infections and increase the quality of your life. Having a very weak immune system allows your body to lose the ability to fight pathogens. This means your body can’t figure out good cells from bad cells. This can cause your body to attack itself. By keeping a healthy immune system, it will allow your body to fight against diseases and cancers. The natural cells will attack and destroy bad cells which can cause diseases.