 This study evaluated the long-term persistence of anti-hepatitis B surface, HBs, antibodies, and the response to a HB-challenge revaccination in children who had received a primary series of DTAR-PIPV-HBPRPT, or DTAR-PIPV-HB-SPRPT co-administered with PCV7 at 2, 4, and 6 months of age. The results showed that anti-HBs geometric mean concentrations, GMCs, and seroprotection rates were high and similar in both groups post-primary vaccination series, and declined to a similar extent in each group at 12 to 18 months. Antibody levels further declined at 9 to 10 years of age, but a strong an amnestic response occurred in each group post-HB-challenge revaccination. The study demonstrated that the kinetics of long-term anti-HBs antibody persistence were similar following a primary series of DTAR-PIPV-HBPRPT, or DTAR-PIPV-HB-PRPT, and that the response to a subsequent HB-challenge revaccination was strong and similar in each group, demonstrating persisting immune memory. This article was authored by Pope Kosseler-Axa, Kulkarnia-Chokify-Bulkit, Suwot-Benjapompatak, and others. We are article.tv, links in the description below.