| seroprevalence of hepatitis b virus and hepatitis c virus in monte negro in the brazilian western amazon region. | this study was carried out in monte negro (state of rondônia), a village in the brazilian western amazon region, where a university of são paulo medical school program for medical student training in rural assistance took place. it aimed to determine the prevalence of hepatitis b virus and hepatitis c virus, to investigate risk factors for infection, and to evaluate the state immunization program against hepatitis b virus in the region. | 2005 | 15838578 |