The bacterium, fungus or the virus that causes diseases always invade the immune system of the individual and reduces the immunity of the individual. The immune system demolishes the disease causing particles with the help of lymphocytes and the antibodies. Various other organs help the immune system, such as spleen, thyroid gland, tonsils, bone marrow etc.The various causes of low immunity are: nutritional deficiency, cancer, HIV/AIDS, low WBC count, low stomach acidity etc. Possible risk factors include stress factors, hereditary factors, and improper diet. The main symptoms are: infections, swollen lymph glands, frequent cold and cold sores or herpes. Sometimes, cancer is also a symptom of |



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