KRT88P and hepatitis B virus infection: Occult hepatitis B infection (OBI) is defined as the presence of the hepatitis B virus (HBV) deoxyribonucleic acid (DNA) in liver tissues and/or serum in the absence of serum HBV surface antigen (HBsAg).1,2 OBI can be classified into two groups: seropositive OBI, where anti-hepatitis B core antibody (anti-HBc) is positive with or without a positive anti-hepatitis B surface antibody (anti-HBs), and seronegative OBI, where both anti-HBc and anti-HBs are negative.3-5