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  4. Impact of hepatitis B vaccination on hepatitis B disease and nucleic acid testing in high-prevalence populations
 
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Impact of hepatitis B vaccination on hepatitis B disease and nucleic acid testing in high-prevalence populations

Journal
Journal of Clinical Virology
Journal Volume
36
Journal Issue
SUPPL. 1
Pages
S45-S50
Date Issued
2006
Author(s)
MEI-HWEI CHANG  
DOI
10.1016/S1386-6532(06)80008-9
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-33745747679&doi=10.1016%2fS1386-6532%2806%2980008-9&partnerID=40&md5=8c64af00806cc1d04171038d189633ca
https://scholars.lib.ntu.edu.tw/handle/123456789/537073
Abstract
Hepatitis B virus (HBV) infection is highly prevalent in Asia, Africa, southern Europe and Latin America, HBV vaccination has effectively reduced the acute and chronic infection rates as well as related complications in the vaccinated children. The incidence of hepatocellular carcinoma in children has been reduced to approximately 25% of the incidence before the vaccination program, and fulminant hepatitis in children has also been reduced after universal hepatitis B vaccination. HBV DNA sero-positive rate was 98-100% in HBsAg positive vaccinated children, while the positive rate was only 11-20% in those vaccinees with a negative HBsAg but positive anti-HBc reaction. Hepatitis B surface gene mutants in HBV DNA positive children increased gradually from 7.8% before the vaccination program, to 19.6%, 28.1% and 23.1% at 5, 10 and 15 years after the vaccination program. Long-term follow-up of vaccinated children has confirmed that universal HBV vaccination in infancy has produced adequate protection up to 14 years of age. The annual decay rate of hepatitis B surface antibody (anti-HBs) was 10.2% in children who did not receive a booster dose. The new HBV infection rate was not different between those who did and those who did not receive a booster dose of HBV vaccine. During a follow-up period of seven years for 1200 vaccinated 7-year-old children in Taiwan, the mean annual hepatitis B core antibody sero-conversion rate was 0.2%. All were negative for HBV DNA. No new chronic HBV infections developed. A booster dose of HBV vaccine is not recommended in children under 15 years of age. Systematic HBV DNA screening of a large population such as blood donors may be instrumental in following the long-term effect of the universal vaccination program on the incidence of silent HBV infection and vaccine escape mutants. ? 2006 Elsevier B.V. All rights reserved.
Subjects
Hepatitis B vaccination; Hepatitis B virus; Hepatocellular carcinoma; Nucleic acid testing; Vaccine escape mutant
SDGs

[SDGs]SDG3

Other Subjects
hepatitis B surface antibody; hepatitis B surface antigen; hepatitis B vaccine; virus DNA; article; blood donor; follow up; gene mutation; hepatitis B; human; immunization; incidence; infection prevention; nucleic acid amplification; population; prevalence; priority journal; serology; vaccination; Hepatitis B; Hepatitis B Vaccines; Hepatitis B virus; Humans; Nucleic Acid Amplification Techniques; Prevalence; Vaccination
Type
journal article

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