WHO and UNICEF estimates of national infant immunization coverage: methods and processes.

Author: Burton- Anthony; Monasch- Roeland; Lautenbach- Barbara; Gacic-Dobo- Marta; Neill- Maryanne; Karimov- Rouslan; Wolfson- Lara; Jones- Gareth & Birmingham- Maureen
Tags: Data quality , UNICEF , WHO

Abstract

WHO and the United Nations Children's Fund (UNICEF) annually review data on immunization coverage to estimate national coverage with routine service delivery of the following vaccines: bacille Calmette-Gu̩rin/ diphtheria-tetanus-pertussis- first and third doses/ either oral polio vaccine or inactivated polio vaccine- third dose of either/ hepatitis B- third dose/ Haemophilus influenzae type b- third dose/ and a measles virus-containing vaccine- either for measles alone or in the form of a combination vaccine- one dose. The estimates are based on government reports submitted to WHO and UNICEF and are supplemented by survey results from the published and grey literature. Local experts- primarily national immunization system managers and WHO/UNICEF regional and national staff- are consulted for additional information on the performance of specific immunization systems. Estimates are derived through a country-by-country review of available data informed and constrained by a set of heuristics/ no statistical or mathematical models are used. Draft estimates are made- sent to national authorities for review and comment and modified in light of their feedback. While the final estimates may not differ from reported data- they constitute an independent technical assessment by WHO and UNICEF of the performance of national immunization systems. These country-specific estimates- available from 1980 onward- are updated annually.

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Type Journal article
Language English
Country Not Specified
Link http://www.who.int/bulletin/volumes/87/7/08-053819.pdf
Journal Bulletin of the World Health Organization
Volume 87
Year 2009
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