A patient is found to be positive only for Anti HBsAg. All other viral markers are negative.The likely diagnosis is :: (A) Vaccination, (B) Chronic hepatitis B, (C) Acute hepatitis B, (D) Fulminant hepatitis B
Answer is A. Answer is A (Vaccination) Isolated Anti-HBs Ag in serum is seen in immunization with HB.s Ag. Possible Causes of Isolated Anti-HBsAg Positivity in serum (Other markers negative) Immunization with HBsAg (after vaccination) Hepatitis B in the remote past (?) False-positive