2022-07-05-世界卫生组织-Immunization_Ethiopia_2022_country_profile_29页_415kb

Immunization Coverage Summary for Ethiopia (WHO & UNICEF, 2021 Revision)

This report, published on July 8, 2022, based on data received as of July 7, 2022, details WHO and UNICEF's estimates for Ethiopia's national immunization coverage for the 2021 revision. The next revision is scheduled for July 15, 2023. Estimates are country-specific, using reported data, surveys, and administrative records, with varying quality and potential biases. A grade of confidence (GoC) is assigned for each estimate, reflecting empirical support.

Key Immunization Estimates Covered

• BCG (Tuberculosis Vaccine): Coverage ranges from 55% to 76% across different years (e.g., 2021 estimated at 68%, challenged by data reliability).
• DTP3 (Diphtheria, Tetanus, Pertussis Vaccine): Estimations fluctuate between 56% and 76% (e.g., 2021 at 68%, with interpolation used in some years).
• MCV1/2 (Measles Containing Vaccine): First dose coverage from 49% to 80%, indicating variability and survey calibration.
• Polio (Pol3): Estimates overlap with IPV where applicable; coverage often overestimated due to frequent campaigns (e.g., 2021 at 68%, challenged).
• HepB (Hepatitis B Vaccine): Birth dose coverage not consistently available in all years (e.g., 2021 data calibrated to 2017 levels).
• Other vaccines include HepB3, Hib, RotaC, IPV1, and MCV related estimates, with similar trends of calibration and intermediate values.

Methodology

WHO and UNICEF estimates are derived from empirical data sources like national reports, surveys, and administrative data. where data is missing or compromised, estimates are adjusted, interpolated, or calibrated using prior levels. For instance, survey data from sources like the Ethiopia Mini Demographic and Health Survey (2019) and other enumerations inform adjustments. GoC is based on supporting sources (e.g., [R+], [S+] for reported or survey support), with no classical uncertainty measures provided.

Challenges and Notations

• Data quality varies, with administrative reports often challenged due to inaccuracies.
• Many years (e.g., 2011-2017) involve estimated or revised values based on surveys or interpolation post-major programme improvements in reporting.
• Campaign effects, such as frequent polio vaccinations, can skew results, leading to overestimation.
• Comparison across vaccines and years is facilitated by consistent adjustments, but all estimates should be used cautiously due to potential biases and the lack of robust uncertainty analysis.

General advice from the report is to assess estimates in the context of the objective and future updates.

Further details and data are available at designated WHO/UNICEF sources.