Jannatin Nisa Arnindita, - and Muhammad Miftahussurur, - and Bagus Setyoboedi, Bagus and Juniastuti, - Seroprevalence of anti-HBs antibodies and the need for booster vaccination in children under 5 years of age born to HBsAg-negative mothers. Asian Pacific Journal of Tropical Medicine, 14 (9). pp. 410-416. ISSN 1995-7645 E-ISSN:2352-4146