eight hundred sixty-eight individuals were screened for seromarkers of hepatitis b infection ( hepatitis b surface antigen and anti-hbs ) , and 287 seronegative patients were vaccinated with the recommended schedule of hepatitis b virus vaccine ( 20 micrograms im at 0 , 1 , and 6 months ) .
C0019163
hepatitis b infection
C0062527
hepatitis b virus vaccine