Progress Toward Hepatitis B Control and Elimination of Mother-to-Child Transmission of Hepatitis B Virus — Western Pacific Region, 2005–2017

• Published in: MMWR. Morbidity and mortality weekly report Vol. 68; no. 8; pp. 195 - 200
• Main Authors: Woodring, Joseph, Pastore, Roberta, Brink, Anne, Ishikawa, Naoko, Takashima, Yoshihiro, Tohme, Rania A.
• Format: Journal Article Newsletter
• Language: English
• Published: United States Centers for Disease Control & Prevention (CDC) 01.03.2019; U.S. Government Printing Office; Centers for Disease Control and Prevention
• Subjects: Antigens; Carcinoma; Child, Preschool; Disease Eradication; Female; Full Report; Hepatitis B; Hepatitis B - epidemiology; Hepatitis B - prevention & control; Hepatitis B - transmission; Hepatitis B Surface Antigens; Hepatitis B vaccines; Hepatitis B Vaccines - administration & dosage; Hepatitis B virus; Hepatocellular carcinoma; Humans; Immunization; Immunization Schedule; Infant; Infant, Newborn; Infection; Infectious Disease Transmission, Vertical - prevention & control; Infectious Disease Transmission, Vertical - statistics & numerical data; International organizations; Pacific Islands - epidemiology; Pregnancy; Public health; Seroepidemiologic Studies; Surveys and Questionnaires; Vaccination Coverage - statistics & numerical data; Vaccines; Pacific Islands; China; Philippines
• ISSN: 0149-2195; 1545-861X; 1545-861X
• DOI: 10.15585/mmwr.mm6808a2

Hepatitis B vaccine (HepB), which has been available since 1982, provides lifelong protection against hepatitis B virus (HBV) infection and the associated 20%-30% increased lifetime risk for developing cirrhosis or hepatocellular carcinoma among >95% of vaccine recipients (1). Before HepB introduction into national childhood immunization schedules, the estimated hepatitis B surface antigen (HBsAg) prevalence in the World Health Organization (WHO) Western Pacific Region (WPR)* was >8% in 1990 (2). In 2005, the WPR was the first WHO region to establish a hepatitis B control goal, with an initial target of reducing HBsAg prevalence to <2% among children aged 5 years by 2012. In 2013, the WPR set more stringent control targets to achieve by 2017, including reducing HBsAg prevalence to <1% in children aged 5 years and increasing national coverage with both timely HepB birth dose (HepB-BD) (defined as administration within 24 hours of birth) and the third HepB dose (HepB3) to ≥95% (3). All WPR countries/areas endorsed the Regional Action Plan for Viral Hepatitis in the Western Pacific Region 2016-2020 in 2015 (4) and the Regional Framework for the Triple Elimination of Mother-to-Child Transmission of human immunodeficiency virus (HIV), Hepatitis B and Syphilis in Asia and the Pacific 2018-2030 (triple elimination framework) in 2017 (5). These regional targets and strategies are aligned with program targets established by the WHO Global Health Sector Strategy on Viral Hepatitis 2016-2021 that aim to reduce HBsAg prevalence among children aged 5 years to ≤1% by 2020 and to ≤0.1% by 2030 (6). This report describes progress made to achieve hepatitis B control in the WPR and the steps taken to eliminate mother-to-child transmission (MTCT) of HBV during 2005-2017. During this period, regional timely HepB-BD and HepB3 coverage increased from 63% to 85% and from 76% to 93%, respectively. As of December 2017, 15 (42%) countries/areas achieved ≥95% timely HepB-BD coverage; 18 (50%) reached ≥95% HepB3 coverage; and 19 (53%) countries/areas as well as the region as a whole were verified to have achieved the regional and global target of <1% HBsAg prevalence among children aged 5 years. Continued implementation of proven vaccination strategies will be needed to make further progress toward WPR hepatitis B control targets. In addition to high HepB-BD and HepB3 coverage, enhanced implementation of complementary hepatitis B prevention services through the triple elimination framework, including routine HBsAg testing of pregnant women, timely administration of hepatitis B immunoglobulin to exposed newborns, and antiviral treatment of mothers with high viral loads, will be needed to achieve the global hepatitis B elimination target by 2030.