how long is hep b vaccine good for
Be sure to test the mother's blood for HBsAg. Give 3 additional hepatitis B vaccine doses with single-antigen vaccine at ages 1, 2 to 3, and 6 months, or hepatitis B-containing combination vaccine at ages 2, 4, and 6 months (Pediarix) or 2, 4, and 12-15 months (Comvax).t depends on the schedule and manufacturer of the vaccine that you are using. For children age 11 through 15 years, the 2-dose Recombivax HB volume is 1.0 mL or 10 micrograms. Otherwise the 3-dose schedule of Recombivax HB is 0.5 mL or 5 micrograms and of Engerix-B is 0.5 mL or 10 micrograms.