Glandular fever is a common infection caused, in most cases, by the Epstein-Barr virus (EBV). It is famous for the fever, sore throat, swollen glands and profound tiredness it brings — and for the way that tiredness can linger for weeks or even months after the acute illness has passed. An EBV antibody panel is the blood test that clarifies whether the virus is behind current symptoms, and whether an infection is recent, current or long in the past.
What EBV and glandular fever are
EBV is one of the most widespread viruses in the world; a large majority of adults have been infected at some point, often without ever knowing. When infection happens in adolescence or adulthood, it more commonly produces the full glandular-fever picture. Once you have had EBV, the virus stays dormant in the body for life, which is why the immune "memory" of it can be measured long afterwards.
How the antibody panel works
The clever part of EBV testing is that different antibodies appear and fade at different stages of infection, so their pattern reveals the timing:
- VCA IgM — viral capsid antigen IgM appears early and suggests a current or recent infection.
- VCA IgG — appears slightly later and persists for life, marking past exposure.
- Early antigen (EA) — often rises during active infection.
- EBNA — Epstein-Barr nuclear antigen antibodies develop weeks to months after infection, so their presence points to an older, established infection rather than a brand-new one.
Read together, this pattern helps a clinician place your infection on a timeline — a genuinely useful thing when tiredness is dragging on and you want to know whether EBV is the likely cause.
Glandular fever and lingering fatigue
Post-viral fatigue after glandular fever is well recognised and can be frustrating, precisely because it often persists once the sore throat and fever have gone. Testing can confirm that EBV was involved, which many people find reassuring, but it does not by itself shorten the recovery. Management centres on rest, gradual return to activity and patience, since most people do recover with time.
When to test and see a doctor
Testing is most helpful when fatigue and other symptoms have persisted and you want to understand the cause, or when several possible explanations are on the table. Bear in mind that many symptoms of glandular fever overlap with other conditions, so a broader check is sometimes worthwhile too. If you have a very sore throat with difficulty breathing or swallowing, severe abdominal pain, or symptoms that are worsening rather than easing, seek medical advice promptly. Private testing complements NHS care and is a useful way to answer the EBV question quickly.
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Specialist interest: Cardiovascular Medicine · OneMedicine, CQC-registered clinic