In the Practice Guidelines, “ACIP Releases 2012 Immunization Schedules,” (February 1, 2012, page 281) the accompanying 2012 young children (birth through six years of age) immunization schedule was clarified by the Centers for Disease Control and Prevention after publication. In Figure 1, the second bulleted item under footnote 1 now reads: “For infants born to h epatitis B surface antigen (HBsAg)–positive mothers, administer HepB vaccine and 0.5 mL of hepatitis B immune globulin (HBIG) within 12 hours of birth. These infants should be tested for HBsAg and antibody to HBsAg (anti-HBs) 1 to 2 months after completion of at least 3 doses of the HepB series, at age 9 through 18 months (generally at the next well-child visit).” The online version of this handout has been updated.