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About
Primary Immune Deficiency Blood Cells The immune system is made up of specialized cells. Some are white blood cells called B cells, T cells and phagocytes, and they are produced in the bone marrow. Another component is a system of plasma proteins called the complement system. When the immune system is missing any of these parts, people are vulnerable to specific types of diseases. Click each immune system component to learn more about it. Immune system components: B cells | T cells | Phagocytes (Macrophage) | Complement system |
