This biomarker is part of the Biolytics App. For a complete list of all available biomarkers, visit: Biomarkers.

EBV-IgG avidity

Aliases: Epstein-Barr virus IgG avidity

Group: Virus

Description:

The EBV-IgG avidity test is a blood test used to determine the strength and maturity of the immune system's response to the Epstein-Barr virus (EBV). During the early stages of an EBV infection, the immune system produces immature IgG antibodies, which gradually mature and strengthen as the infection progresses. The avidity test measures the strength of this immune response, helping to estimate how long the infection has been present. This information is useful for differentiating between a recent or past EBV infection. The test is often used in combination with other EBV-specific tests to provide a more comprehensive understanding of the infection's stage and duration. High avidity index values indicate a mature and strong immune response, suggesting a past or longstanding infection, while low values may indicate a recent or ongoing infection.