From the research I’ve done, here’s what I believe. Early antigen and viral capsid antigen IgM are present during an active infection. Viral capsid IgG and nuclear antigen stay in your body after infection so elevated levels indicate a past exposure. The only difference I can find between those two are that viral capsid IgG is present during infection, drops, and remains stable and present for life. Nuclear antigen antibodies only appear once the infection has resolved and remain for life. So it is normal to have those antibodies present after mono but I wonder if it is normal to have them be so high! My primary care doctor can’t seem to give me a straight answer or maybe doesn’t understand my question. She keeps telling me that I don’t have mono, which I understand. Does anyone know what kind of specialist I should ask to be referred to?