PIIgG stands for Polyvalent Immunoglobulin G and is a type of antibody found in the human body. The term PIIgG is also sometimes used to refer to plasma-derived immunoglobulin G, which is used to treat various medical conditions. Synonyms for PIIgG include "immunoglobulin G," "IGG," and "gamma globulin." These terms are often used interchangeably in medical literature and discussions. Other related terms include "monoclonal antibody," "serum protein," and "antibody therapy." Regardless of the specific terminology used, all of these terms refer to the important role that antibodies play in protecting the body against disease and infection.