title: The frequency of detection of anti-HBc in blood donors from four regions of Russia
abstract: Introduction . Occult hepatitis B virus (HBV) revelation in HBV nuclear antigen testing is of particular importance to prevent transfusion infection. Aim — the identification of factors affecting the anti-HBc detection rate in donated transfusable blood components from different regions of Russia. Materials and methods . A cohort screening single-stage epidemiological study was conducted with 2,000 donor blood samples, 500 samples per each of four regions of the country, the Republics of Crimea 
journal: Russian journal of hematology and transfusiology