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Hepatitis A IgG

Infection and immunity tests · also printed as Hep A IgG, Hepatitis A antibody, HAV IgG, Anti-HAV IgG, Hep A antibody

Typical UK adult rangeExpected result: Positive

Positive, or Immune, is the expected result in someone who has been vaccinated or infected.

What this test measures

Hepatitis A IgG is the long-lasting antibody that appears after hepatitis A infection or vaccination. It shows immunity.

Why doctors request it

Checked before travel vaccination and when someone is unsure whether they have been vaccinated.

What commonly pushes it up

Past infection or vaccination, both of which give lasting immunity

What commonly pushes it down

Negative means no immunity; vaccination can be offered

Everyday reasons for a value outside the range

Some labs report a number in IU/L with a threshold; keep the printed form

About the sample

No fasting needed.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

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This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.