Anamnestic response is process involves a more rapid synthesis and greatly increased titer of antibody when the immune system is subsequently exposed to the same antigen.
It increase the production of an antibody following second or later contact with the provoking antigen or with related antigens. Immunological response is a second or subsequent exposure to antigen which caused a greater and rapid reaction that elicited by initial exposure.
IgM is first antibody to be produced in humeral immune response. If antigen appears in the organisms a second time then the memory cells are already present at high levels ans which produced a more rapid and stronger immune response.
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