Question

Why does immune system become weak in old age?

Answer 1

As we age, our immune systemsdevelop defenses against antigens. ... Others help coordinate other parts of the immune system. Although the number of T cells does not decrease with aging, T-cell function decreases. This causes parts of the immune system to weaken and increases the risk for becoming ill

Answer 2

Answer:

• The effects of aging on the immune system are manifest at multiple levels that include reduced production of B and T cells in bone marrow and thymus and diminished function of mature lymphocytes in secondary lymphoid tissues. As a result, elderly individuals do not respond to immune challenge as robustly as the young