2022-07-05-世界卫生组织-Immunization_Sudan_the_2022_country_profile_18页_381kb

WHO and UNICEF National Immunization Coverage Estimates Summary

Core Content

The World Health Organization (WHO) and United Nations Children's Fund (UNICEF) jointly estimate national immunization coverage levels based on data submitted by Member States, including administrative reports, official assessments, and survey results. These estimates aim to provide a more accurate reflection of immunization system performance, taking into account potential biases and data inconsistencies. The estimates are not based on ad hoc adjustments but rather on empirical data and a systematic review process. In cases where data are missing, they are interpolated using available data from adjacent years.

Main Views

• Estimates are country-specific, meaning each country's data is analyzed individually.
• Estimates are not based on confidence intervals due to the absence of a probability model, but they are categorized by a Grade of Confidence (GoC) to reflect the level of empirical support.
• Data sources vary:
  • Administrative data are based on aggregated reports from health service providers.
  • Official data reflect national authorities' assessments, which may combine multiple data sources.
  • Survey data are derived from population-based household surveys, often adjusted for recall bias.

Key Information

Immunization Coverage Indicators

Grade of Confidence (GoC)

• The GoC is a qualitative indicator of the level of empirical support for the estimate.
• It is not a judgment of data quality but reflects the degree of support from:
  • R+: Reported data.
  • D+: Recalculated denominator using UN Population Division data.
  • S+: Supporting survey data within 2 years.
• GoC levels:
  • ● – Low confidence.
  • ●● – Moderate confidence.
  • ●●● – High confidence.

Data Challenges

• In some years, the estimates are challenged by data inconsistencies or inaccuracies.
• The challenged status is indicated by [D-], [R-], or [S-], representing conflicting or insufficient data sources.

Summary Table

Notes on Specific Years

• 2021: Estimate based on administrative data, awaiting results from the 2022 Multiple Indicator Cluster Survey (MICS).
• 2020: Estimate based on national government data, with reports of vaccine stock-outs.
• 2019-2016: Estimates based on national government data, with varying levels of GoC.
• 2013: Supported by a survey with recall bias adjustments.
• 2010: Based on combined reports from southern and northern Sudan.

Disclaimer

• The data and estimates provided are not guaranteed and are subject to potential inaccuracies.
• The GoC is used to indicate the degree of empirical support for the estimate, not the quality of data reported by national authorities.
• The responsibility for interpreting and using the data lies with the reader.
• Estimates should be used with caution and assessed based on the objective for which they are intended.