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We call this type of immunity adaptive---> natural----> active immunity. Here how it works:

Adaptive immunity involves two classes of lymphocyte: B cells and T cells which work together in a coordinated system of adaptive immunity

B cells-antibody-mediated (humoral) immunity

T cells-cell-mediated (cellular) immunity

Adaptive immunity occurs in a series of stages

1. Recognition of antigen (flu virus)

2. Activation of lymphocytes

3. Effector phase (immune attack)

4. Decline of antigen causes lymphocyte death (homeostatic balance)

5. Memory cells remain for later response if needed

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11y ago

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