Individual test · Labcorp 209601

Immunoglobulin G, Subclasses (1-4)

This test measures the levels of four specific types of Immunoglobulin G (IgG), which are antibodies your immune system uses to fight infections. It helps show if your body is making enough of each specific antibody type to protect you against bacteria and viruses, which is often checked when a person has frequent infections. This information helps doctors look for specific weaknesses in your immune system's defense. However, this test does not diagnose allergies or identify the specific germ causing a current illness.