[Analysis of HBV source in patients hospitalized at the Department of Hematology and Clinical Immunology of the Medical Academy in Warsaw in the years 2000-2003].

The purpose of the study was to evaluate routes of HBV transmission in 140 patients hospitalized in the Department of Hepatology and AIDS, Medical University of Warsaw in the years 2000--2003. Authors found two major routes of HBV infection in the observed patients: drug abuse and the unknown route in the group of young people and infection transmitted at the non-surgical wards among the patients older than 40 years.