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The Serum IgG (Immunoglobulin G) Test is a quantitative blood test that measures the concentration of IgG antibodies, the most abundant type of antibody in the human body. IgG plays a key role in the body’s long-term immune defense by identifying and neutralizing bacteria, viruses, and other pathogens.
This test is useful for:
Evaluating immune system health
Detecting chronic infections (e.g., hepatitis, tuberculosis)
Monitoring autoimmune diseases (e.g., lupus, rheumatoid arthritis)
Assessing immunodeficiency or hypergammaglobulinemia
Monitoring response to vaccines