IgG Antibodies

The IgG (immunoglobulin G) test is a blood test that measures the level of immunoglobulin G, the most abundant antibody in the body. IgG plays a key role in protecting against infections by providing long-term immunity against viruses and bacteria. Abnormal IgG levels may indicate immune system disorders, chronic infections, or autoimmune diseases. The IgG test is often used to assess immune status, diagnose immunodeficiencies, and detect the presence of antibodies to specific pathogens.