HBV antibody persistence in adolescents vaccinated with DTPa-HBV-IPV/Hib as infants.

More than half of the adolescents who received a 4-dose vaccination schedule in their infancy maintained seroprotective antibody levels against infection from hepatitis B virus (HBV), according to a study published in the Human Vaccines & Immunotherapeutics. A robust anamnestic response was mounted in most participating adolescents when challenged with a dose of monovalent HBV vaccine.