in addition , study of immune complex-receptor systems such as complement , macrophages and lymphocytes helps to explain the way complexes are handled by these components of the immune system and raises the question whether the difficulty of eliminating pathogenic antigens of bacterial , viral or autoimmune nature through immune complex formation in fact is not a defect in antibody formation but rather a defect in clearing the opsonized antigen from circulation .
C0003321
antigens
C0003320
antigen