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Hepatitis A test: IgG antibodies to HAV in blood
Medical expert of the article
Last reviewed: 04.07.2025
The increase in anti-HAV IgG occurs at a later stage - in the convalescence phase - and therefore cannot serve as a criterion for early diagnosis of viral hepatitis A. Detection of anti-HAV IgG in healthy people (possibly in 30-60% of the healthy population) indicates a previous infection and immunity (retrospective diagnosis). At the same time, the absence of anti-HAV IgG during the peak of hepatitis allows us to exclude its connection with HAV. Quantitative determination of anti-HAV IgG in blood serum can be used to assess the dynamics of the post-vaccination immune response during vaccination against viral hepatitis A.
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