2022-07-06-世界卫生组织-Immunization_Qatar_2022_country_profile_16页_359kb
报告摘要
Report Overview
This document details WHO and UNICEF's estimates of Qatar's national immunization coverage for key vaccines from 2010 to 2021. The estimates are based on national data, administrative records, and surveys, with a focus on vaccines including BCG, DTP1, DTP3, Pol3, IPV1, MCV1, MCV2, RCV1, HepBB, HepB3, Hib3, RotaC, and PcV3. The analysis reveals high overall coverage but highlights disruptions due to the COVID-19 pandemic and data quality issues.
Methodology
- Estimates are country-specific and not borrowed from other nations.
- Data sources include nationally reported administrative data, household surveys, and programmatic reports.
- The Grade of Confidence (GoC) system is used to rate estimates: ••• (high confidence) for well-supported data, •• (medium confidence) for supported by at least one source, and • (low confidence, challenged) when data is questioned.
- No probability models or confidence intervals are provided; estimates should be used cautiously, considering the specific objective.
Key Immunization Coverage Estimates for Qatar
| Vaccine | Coverage Trend (Selected Years) | COVID-19 Impact | Notes |
|---|---|---|---|
| BCG | High (>95%) from 2010-2021 | Minimal impact | Consistently high based on national reports. |
| DTP1 | 90-99% range; dip in 2010-2020 | Declined in 2020 (due to COVID service disruptions) | Challenges noted in 2010-2012. |
| DTP3 | 90-99% range; stable overall | Declined in 2020-2021 (COVID-related) | GoC varies; some years challenged. |
| Pol3 | High (89-99%); dip in 2020 | Alignment with COVID recovery; downslope due to disruptions | No surveys; data from administrative reports. |
| IPV1 | New in 2015; consistently high | Improved 2021 due to recovery; dip in 2020 | Coverage above 96% from 2015 onwards. |
| MCV1 | High (97-99%) most years | No major dips; interruptions noted | GoC challenged in some periods due to data issues. |
Other vaccines like RCV1 rely on measles-based estimates, HepBB is consistently high, and newer doses like RotaC and Hib3 show variability post-pandemic.
Impact of COVID-19
The 2020-2021 revision indicates significant declines in coverage for many vaccines due to service disruptions, stock-outs, and reduced target populations. Increases in 2021 align with pandemic recovery efforts, but gaps remain.
Data Quality and Limitations
- All estimates have varying data quality and are subject to GoC ratings.
- Lack of nationally representative surveys recently and potential biases in administrative data.
- Disclaimer: Estimates should be used with caution; no formal uncertainties are provided.
Survey Findings
Based on the 1997-2000 survey, infant coverage was high, with BCG and DTP1 at ~96%, but routine surveillance has been lacking post-2000, relying primarily on national reports.
Assessment of Immunization Performance
Qatar maintains high immunization coverage overall, with few exceptions linked to external factors like COVID-19. Continuous monitoring and high national reporting suggest strong system performance, but data reliability is variable.
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