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Hepatitis A test: IgG antibodies to HAV in the blood
Medical expert of the article
The growth of anti-HAV IgG occurs at a later time - in the phase of convalescence - and therefore can not serve as a criterion for early diagnosis of viral hepatitis A. The detection of anti-HAV IgG in healthy people (possibly in 30-60% of healthy population) indicates a previous infection and immunity (retrospective diagnosis). At the same time, the absence of anti-HAV IgG during the height of hepatitis makes it possible to exclude its association with HAV. Quantitation of anti-HAV IgG in serum can be used to assess the dynamics of the postvaccinal immune response in vaccination against viral hepatitis A.