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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The earlies antibody marker to appear In the serum in Hepatitis B virus infection Is-
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The correct answer is  <P>Davidson&;s principles and practice of medicine 22nd edition. #HBc Ag is not found in blood but antibody to it appeared early in the illness (incubation period) and rapidly reached a high titre which subsides gradually but then persist.</p>