Occult hepatitis B is:
Correct Answer: HBV DNA < 104 copies/ml with HBsAg negative
Description: Occult hepatitis B is defined by the presence of HBV DNA in serum or liver in the absence of HBsAg. Serum HBV level is usually less than 104 copies/ml. Occult HBV infection has been found in patients with HCC, past HBV infection, or chronic hepatitis C, and individuals without HBV serological markers.
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