KRT88P and hepatitis B virus infection: The same restriction is applied to yet another method to estimate HBV incidence in blood donors based on anti-HBc positive test result and any of the following: a positive test result for anti-HBe (antigen to HBV antibody “e”), anti-HBc IgM, DNA for HBV on current or previous donation, anti-HBs (antigen to HBV antibody “s”) without vaccination against hepatitis B [17].