{"id":"ebv-vca-igm","name":"EBV viral capsid antigen (VCA) IgM","shortName":"EBV VCA IgM","aliases":["EBV VCA IgM","Epstein-Barr VCA IgM","EBV Viral Capsid Ag IgM","Epstein-Barr Virus VCA, IgM","EBV Viral Capsid Antigen IgM","Epstein-Barr Virus Viral Capsid Antigen (VCA) Antibody (IgM)","Epstein-Barr Virus Antibody to Viral Capsid Antigen, IgM","EBV VCA IgM, S","EBV Capsid Antibody IgM","EBV Current Infection","Anti-VCA IgM","VCA IgM","EBV VCA-IgM"],"abbreviations":["VCA IgM","EBV VCA IgM","anti-VCA IgM"],"loinc":[{"code":"24115-8","primary":true},{"code":"7886-5","primary":false},{"code":"5159-9","primary":false},{"code":"30340-4","primary":false},{"code":"20491-7","primary":false}],"specimen":"serum","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"An early antibody to Epstein-Barr virus that is often present during a first infection and fades within weeks to a few months.","url":"https://bloodtesttracker.com/markers/ebv-vca-igm","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}