Immunoglobulin IgG Subclass 4

Immunoglobulin IgG Subclass 4 is done to evaluate the amount of immunoglobulin proteins in the body. Your doctor would recommend this test for you if you show signs like frequent bacterial or viral infections, chronic diarrhea, sinus infection, lung infections or breathing troubles, or if there is a history of immunodeficiency in the family. Immunoglobulins or antibodies are specific proteins which are made by the immune system to fight against disease-causing substances, like viruses and bacteria. The presence of these may be suggestive of a health concern which needs attention.