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The immune effects of hepatitis B on children boosted with hepatitis A and B combined vaccine |
LIU Can-lei, YAO Jun, SHI Hai-yun, SHANG Jian-bin, CHEN Dan, YIN Yin-xiang, LUO Ping
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The Center for Disease Control and Prevention of Yuhuan City, Taizhou, Zhejiang, 317600, China |
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Abstract Objective To observe the concentration of the anti-HBs of children boosted with hepatitis A and B combined vaccine for 3 dosages, and to provide the basis for the implementation of hepatitis B booster immunization. Methods In September 2009 in Yuhuan by employing the cluster sampling method, 123 children, ranging from 6 to 9 years old,who had completed the basic immunization by 0-1-6 procedure without hepatitis B vaccine boosted and without anti-HBs were selected. In the year of 2011(after 1 year of inoculation)and 2015(5 years after inoculation),the venous blood samples were collected to determine the concentration of anti-HBs. Results Boosted with hepatitis A and B combined vaccine for 3 times, the anti-HBs of 102 subjects was tested in the next year, of which the anti-HBs of 82 subjects was detected again in the later 5 years. The results suggested that the positive rates of antibody enhanced were 92.16% after 1 year and 78.05% after 5 years, respectively. The average concentration of anti-HBs of these 82 subjects was 2.95 mIU/mL before inoculation, 141.76 mIU/mL one year later and 72.13 mIU/mL 5 years later and there was statistically significant difference among them(P<0.05). The difference was not statistically significant between subjects with different years of birth(P>0.05). Moreover,the interaction was existed between the year of blood detection and year of birth (P<0.05). Conclusion To children aged 6-9 years old whose anti-HBs were negative after the primary immunization of hepatitis B, booster immunization with 3 dosages of hepatitis A and B combined vaccine shows good immune effect against hepatitis B virus.
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Received: 01 March 2017
Revised: 01 August 2017
Published: 06 November 2017
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