Antibodies

• Neutralization: The ability of antibodies to block the sites of bacteria or viruses so they cannot enter the target cell.

          Neutralization can be used against microbes and toxins.

• Opsonization: The process when opsonins coat the bacteria/virus to make sure that the Fc receptor on a phagocytic cell is able to bind.

           Opsonization helps initiate the process of phagocytosis. 

• Antibody-dependent cell-mediated cytotoxicity (ADCC): The killing of an antibody coated cell without using phagocytosis.

          ADCC cells include natural killer cells, macrophages, neutrophils, and eosinophils.

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