title: Impact of Adverse Events Following Immunization in Viet Nam in 2013 on chronic hepatitis B infection.
abstract: Adverse Events Following Immunization in Viet Nam in 2013 led to substantial reductions in hepatitis B vaccination coverage (both the birth dose and the three-dose series). In order to estimate the impact of the reduction in vaccination coverage on hepatitis B transmission and future mortality, a widely-used mathematical model was applied to the data from Viet Nam. Using the model, we estimated the number of chronic infections and deaths that are expected to occur in the birth cohort in 2013 and the number of excessive infections and deaths attributable to the drop in immunization coverage in 2013. An excess of 90,137 chronic infections and 17,456 future deaths were estimated to occur in the 2013 birth cohort due to the drop in vaccination coverage. This analysis highlights the importance of maintaining high vaccination coverage and swiftly responding to reported Adverse Events Following Immunization in order to regain consumer confidence in the hepatitis B vaccine.
authors.affiliation: Johns Hopkins University, Candidate for Master of Science in Public Health, 615 N. Wolfe St., Baltimore, MD 21205, United States.
authors.forename: Xi
authors.initials: X
authors.lastname: Li
authors.affiliation: Expanded Programme on Immunization Unit, World Health Organization, Western Pacific Regional Office, PO Box 2932, Manila, Philippines. Electronic address: wiesene@wpro.who.int.
authors.forename: Eric
authors.initials: E
authors.lastname: Wiesen
authors.affiliation: Expanded Programme on Immunization Unit, World Health Organization, Western Pacific Regional Office, PO Box 2932, Manila, Philippines.
authors.forename: Sergey
authors.initials: S
authors.lastname: Diorditsa
authors.affiliation: Expanded Programme on Immunization Unit, World Health Organization Country Office, 63 Tran Hung Dao Street, Hoan Kiem District, Ha Noi, Viet Nam.
authors.forename: Kohei
authors.initials: K
authors.lastname: Toda
authors.affiliation: National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hai Ba Trung, Ha Noi 10000, Viet Nam.
authors.forename: Thi Hong
authors.initials: TH
authors.lastname: Duong
authors.affiliation: National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hai Ba Trung, Ha Noi 10000, Viet Nam.
authors.forename: Lien Huong
authors.initials: LH
authors.lastname: Nguyen
authors.affiliation: National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hai Ba Trung, Ha Noi 10000, Viet Nam.
authors.forename: Van Cuong
authors.initials: VC
authors.lastname: Nguyen
authors.affiliation: National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hai Ba Trung, Ha Noi 10000, Viet Nam.
authors.forename: Tran Hien
authors.initials: TH
authors.lastname: Nguyen
mesh_terms: D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D017325:Hepatitis B Vaccines / Q000009:adverse effects* / Q000627:therapeutic use*; D019694:Hepatitis B, Chronic / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D014611:Vaccination / Q000009:adverse effects* / Q000706:statistics & numerical data*; D014744:Vietnam / Q000453:epidemiology
chemical_list: D017325:Hepatitis B Vaccines
keywords: Adverse events following immunization; Disease burden; Hepatitis B; Vaccination coverage; Viet Nam