What is Occult hepatitis B is: and explain in detail?
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.