Experiencing symptoms like fatigue, sore throat, or swollen lymph nodes? An Epstein-Barr Virus (EBV) Viral Capsid Antigen Test (IgG) can help determine if you’ve been previously exposed to EBV. This test detects IgG antibodies specific to the viral capsid antigen, indicating past EBV infection. While EBV often causes infectious mononucleosis, it can also be linked to other health conditions. Consultation with a healthcare provider is important for a proper evaluation and understanding of your immune response to EBV, especially if symptoms persist or worsen.