2023-07-16-世界卫生组织-Immunization_Zimbabwe_2023_country_profile_24页_402kb

报告摘要

Zimbabwe Immunization Coverage Estimates Summary (WHO & UNICEF, 2022 Revision)

Overview

This report provides WHO and UNICEF estimates of national immunization coverage for Zimbabwe based on data received through June 26, 2023, with the next revision available July 15, 2024. The estimates are country-specific and reviewed individually, drawing from reported data, surveys, administrative records, and statistical methods to account for potential biases.

Methodology

Estimates are derived from multiple sources, including national reports, household surveys, and denominator adjustments.
Grade of Confidence (GoC) is used to indicate data reliability:
- ••• (Well-supported): Backed by reported data, survey evidence, and adjusted denominators.
- •• (Limited support): Based on at least one data source but potentially challenged.
- • (Low confidence or challenged): Indicates data gaps, inconsistencies, or high risk of error.
No probability models are applied, so confidence intervals are not provided. Estimates are prone to bias due to varying data quality.

Key Findings

Immunization coverage shows significant fluctuations between 2011 and 2022, with most vaccines ranging from 30% to 99%.
High coverage was observed in BCG (e.g., 98% in 2017) and DTP3 (e.g., 95% in 2019), though some years saw drops due to stockouts or administrative issues.
IPV1 coverage began in 2015, with estimates around 65-90%, challenged in 2021 due to data inconsistencies.
MCV1 and MCV2 coverages were generally high (e.g., 85-95%), but some estimates lacked empirical support.
For combination vaccines like RCV1, estimates are based on MCV1 data due to limited direct measurements.
Recent years (2021-2022) indicate some stability, but concerns remain due to unexplained increases in target populations and reporting issues.

Caveats

Data quality varies, and estimates should be used cautiously in decision-making, as they may not fully capture reality.
Surveys play a key role where available, but historical data sometimes face reliability challenges.
Recommended actions include continuous data improvement and monitoring to enhance accuracy.

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