Immunology Question:

Answer #1
The capacity of an antiserum containing various antibodies to combine with the whole antigen is called avidity. Thus, avidity is used to denote the overall capacity of an antibody to combine with multivalent antigen.

A multivalent antigen has many types of antigenic determinants, when this is injected into the blood each antigenic determinant stimulate the production of particular antibody.

Answer #2
Avidity is the strength of bond after the formation of Antigen -Antibody Complex. Its reflect the overall combining property of the various Antibody molecules is an antiserum, possessing different sffinity constants with multiple epitops of Antigen.