Is anti-HAV IgM antibody detectable in serum after vaccination?

Yes, the presence of anti-HAV IgM is part of the normal immune response to exposure to hepatitis A virus whether it is wild virus or inactivated vaccine virus. Anti-HAV IgM is detectable in the serum about two weeks after vaccination and can continue to be detected for up to 6 weeks depending on the immune response mounted and the sensitivity of the test. More.

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