2022-07-05-世界卫生组织-Immunization_Algeria_2022_country_profile_19页_371kb

Analysis Summary: WHO and UNICEF Immunization Coverage Estimates for Algeria (2021 Revision)

• Purpose: The document provides country-specific estimates for various immunization coverage indicators based on data submitted by Algeria.

• **Methodology:

  • Data sources: Administrative records, survey-based estimates, and empirical data collected from different years.
  • Grade of confidence (GoC): Estimated coverage levels reflect confidence in the data, with:
    • No accepted empirical data (for recent years with lack of reporting).
    • Nuanced grades (e.g., ••• for high support, • for challenged estimates) indicating data reliability.
  • No statistical uncertainty intervals provided due to lack of probability modeling.

• **Key Vaccines and Coverage Trends:

  • BCG: High coverage (~99-100%) from 2010-2021, with consistent official estimates.
  • DTP1/DTP3/Pol3: Generally stable at ~95-99%, but some years lack empirical data (extrapolation).
  • HepBB: Consistently high coverage (~99-100%), declared by national authorities.
  • Other vaccines (IPV1, MCV1, etc.): Fluctuate between years, with some estimates challenged by data biases or lack of surveys.
  • Trends show mostly high coverage, but variations depend on available data quality and country-specific schedules.

• **Limitations and Caveats:

  • Data quality varies: Administrative data may be biased, surveys are interpolated, and some years rely on extrapolation.
  • Estimates should be cautiously used due to potential misrepresentation of coverage and lack of error ranges.
  • Methodology emphasizes empirical support, not objective data quality judgments.

• **Additional Information:

  • Next revision expected: July 15, 2023.
  • Data sources: National authorities, surveys (e.g., Multiple Indicator Cluster Surveys).
  • For detailed data, refer to WHO and UNICEF online resources.