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Using the Immunization Information System to Determine Vaccination Coverage Rates among Children Aged 1–7 Years: A Report from Zhejiang Province, China

Author

Listed:
  • Qian Li

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Yu Hu

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Yanpeng Zhong

    (Institute of Technology Development, Suzhou Shensu Automatic Technology CO, LTD., Shenyang 110000, China)

  • Yaping Chen

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Xuewen Tang

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Jing Guo

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

  • Lingzhi Shen

    (Institute of Immunization and Prevention, Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China)

Abstract

Background: The Zhejiang Immunization Information System (ZJIIS) was established in 2004. This study described the coverage rates of NIP vaccines in Zhejiang Province using the ZJIIS. Methods: Children aged 1–7 years (born from 1 January 2005 to 31 December 2011) registered in ZJIIS were enrolled in this study. All immunization records were obtained from the ZJIIS on 31 December 2012. The cohort method had been used for identifying trends and patterns in vaccine administration. Immunization coverage estimates were analyzed for both individual NIP vaccines and “Fully immunized” by age group, birth cohort, immigration status, and geography area. We also examined the timeliness vaccination for the 2010 birth cohort. Results: A total of 3,579,896 children were registered in ZJIIS. All the vaccines and doses which scheduled to be given at ≤12 months of age exceeded 90%. There was substantial decrease trend in the vaccines scheduled at >12 months of age and most of these vaccines were below 90%. The coverage of migrant children was lower than for resident children and the coverage of WenZhou (WZ), Zhoushan (ZS) and TaiZhou (TZ) was lower than other municipalities for most of vaccines across all the birth cohorts. Nearly 20%–30% of children of 2010 birth cohort delayed for the primary series vaccination scheduled at ≤12 months of age, especially among migrant children. Conclusions: The ZJIIS is useful in tracking vaccine coverage of children aged 1–7 years and the data provided by ZJIIS reflected the fact that NIP delivery was improving in Zhejiang Province, while identifying some areas for improvement. We recommend continuing surveillance to estimate of vaccine coverage through ZJIIS. Immunization strategies such as Assessment, Feedback, Incentives, and Exchange program, reminder/recall activity, home visits, school entry requirements and school-based clinics could be used to reach a higher coverage of the population.

Suggested Citation

  • Qian Li & Yu Hu & Yanpeng Zhong & Yaping Chen & Xuewen Tang & Jing Guo & Lingzhi Shen, 2014. "Using the Immunization Information System to Determine Vaccination Coverage Rates among Children Aged 1–7 Years: A Report from Zhejiang Province, China," IJERPH, MDPI, vol. 11(3), pages 1-16, March.
    • Handle: RePEc:gam:jijerp:v:11:y:2014:i:3:p:2713-2728:d:33709
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    Citations

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    Cited by:

    1. Yu Hu & Lingzhi Shen & Jing Guo & Shuyun Xie, 2014. "Public Health Workers and Vaccination Coverage in Eastern China: A Health Economic Analysis," IJERPH, MDPI, vol. 11(5), pages 1-12, May.
    2. Yu Hu & Ying Wang & Yaping Chen & Hui Liang, 2019. "Analyzing the Urban-Rural Vaccination Coverage Disparity through a Fair Decomposition in Zhejiang Province, China," IJERPH, MDPI, vol. 16(22), pages 1-10, November.
    3. Yu Hu & Yaping Chen & Bing Zhang & Qian Li, 2016. "An Evaluation of Voluntary Varicella Vaccination Coverage in Zhejiang Province, East China," IJERPH, MDPI, vol. 13(6), pages 1-10, June.
    4. Yu Hu & Yaping Chen, 2017. "Evaluating Childhood Vaccination Coverage of NIP Vaccines: Coverage Survey versus Zhejiang Provincial Immunization Information System," IJERPH, MDPI, vol. 14(7), pages 1-8, July.
    5. Yu Hu & Yaping Chen & Ying Wang & Hui Liang, 2019. "Validity of Maternal Recall to Assess Vaccination Coverage: Evidence from Six Districts in Zhejiang Province, China," IJERPH, MDPI, vol. 16(6), pages 1-9, March.
    6. Yu Hu & Hui Liang & Ying Wang & Yaping Chen, 2018. "Inequities in Childhood Vaccination Coverage in Zhejiang, Province: Evidence from a Decomposition Analysis on Two-Round Surveys," IJERPH, MDPI, vol. 15(9), pages 1-12, September.

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