All students must have a series of three Hepatitis B vaccinations (0, 1, and 6 months), and a post-vaccine surface antibody titer (to demonstrate immunity). The earliest the antibody titer can be ...

Of the 102 children (group 1a) who had received 3 doses of a plasma-derived hepatitis B vaccine as infants, 42 (41%) had anti-HBs titers ≥10 ... anti-HBs levels had fallen below 10 mIU/mL ...

Those with nonprotective titers (<10 mIU/mL) received a booster dose. We similarly followed 16 children of hepatitis B surface antigen (HBsAg)-positive mothers. Results: Of low risk infants ...