monoclonal immunoglobulinintravenous immunoglobulinquantitative immunoglobulinssubcutaneous immunoglobulindifferent types of immunoglobulinsigg immunoglobulinsecretory immunoglobulinimmunoglobulin in colostrumigm immunoglobulinmost abundant immunoglobulinimmunoglobulin superfamilyelevated immunoglobulin a