the incidence of infection with hepatitis b and of development of hbsag was significantly lower in both patients and staff who received the high-titer material than in subjects who received the low-titer preparation eight but not 12 months after randomization ( p less than 0.01 for patients and p less than 0.04 for staff , low-titer vs. high-titer at eight months ) .
C0019163
hepatitis b
C0019168
hbsag