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Era of Vaccination Heralds a Decline in Incidence of Hepatitis A in High-Risk Groups in China

AUTHORS

Zhuang Fangcheng 4 , * , Wang Xuanyi 2 , Chen Mingding 3 , Jiang Liming 4 , Wu Jie 4 , Jiang Qi 5 , Gong Yuanping 6 , Qian Wen 1 , Xin Yajuan 1 , Mao Jiangsen 4

AUTHORS INFORMATION

4 Key Lab for Bio-tech Vaccine Research, Hangzhou, China

2 Biomedical Research Institute, Fudan University, Shanghai, China

3 Center for Disease Control (CDC), Beijing, China

5 Center for Disease Control (CDC), Shenshi, China

6 Center for Disease Control (CDC), Jiaojiang, China

1 Institute of Viral Disease, Zhejiang Academy of Medical Sciences, Hangzhou, China

How to Cite: Fangcheng Z, Xuanyi W, Mingding C, Liming J, Jie W, et al. Era of Vaccination Heralds a Decline in Incidence of Hepatitis A in High-Risk Groups in China, Hepat Mon. Online ahead of Print ; 12(2):100-105. doi: 10.5812/hepatmon.838.

ARTICLE INFORMATION

Hepatitis Monthly: 12 (2); 100-105
Published Online: January 31, 2012
Article Type: Research Article
Received: September 19, 2011
Accepted: January 15, 2012
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Abstract

Background: Hepatitis A was ranked first among all of the different types of viral hepatitis in China, which occurred an average of 500,000 cases annually during the 1980s. A live attenuated hepatitis A vaccine was applied in preventing of the disease in 1992, large scale used in vaccination program in 1995, and incorporated in the Expanded Program of Immunization in 2008 in China.

Objective: The objective of this study was to determine whether, and to what extent, the decline in the incidence of hepatitis A in China was the result of hepatitis A (HA) vaccination.

Materials and Methods: Official documents and longitudinal serological follow-up studies were reviewed to compare the incidence of HA before and after the introduction of the vaccine.

Results: National trends in the incidence of HA in China saw rates decrease by 92.7% in 2009, compared to the levels seen in 1992. A mass vaccination program was carried out in 3-18 year old children (Wuhan City, China), and its protective efficacy was 85.4%. In a mass vaccination program of an entire population (Shenshi County, China), the annual HA incidence decreased from 359.7/100,000 to 17.7/100,000 (almost 20.3 times). There was a significant relationship found between vaccine coverage and the incidence of HA, the correlation of the negative regression was significant at the 1% (Kendall rank correlation, significant level P < 0.05).

Conclusions: In summary, this study highlights the important role of implementing a vaccination program in decreasing the incidence of HA, and the large protective efficacy of such a strategy, as demonstrated in China

Keywords

© 2012, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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