| study on hepatitis b virus (hbv) infection and hepatitis b virus carrier state in children at two mobil oil indonesia locations in indonesia. | between may and july 1985, a cross-sectional study on hepatitis b virus (hbv) infection and hepatitis b virus carrier state was conducted in children at two locations of mobil oil indonesia i.e. jakarta and medan. two main groups of mobil oil indonesia population namely "employees" and "dependents" were also included in this study. from each subject, 10 ml of venous blood was taken and the sera separated and kept in a freezer at the temperature of -20 degrees c before sending them to the laborat ... | 1990 | 2075016 |