2022-07-05-世界卫生组织-Immunization_Maldives_2022_country_profile_18页_360kb

Maldives Immunization Coverage Summary (WHO/UNICEF, 2021 Revision)

Overview

The report presents WHO and UNICEF estimates of immunization coverage for Maldives based on data from 2010 to 2021. Coverage is generally high, averaging 95-99% for various vaccines, but estimates are challenged by potential data biases, stock-outs, and inconsistencies with surveys. Grades of confidence (GoC) indicate the strength of empirical support, with estimates used cautiously due to varying data quality.

Key Vaccination Coverage Estimates

• BCG: Consistently >97% coverage, often using national reports; GoC varies, with surveys in 2015-2017 showing 92% but official estimates higher.
• DTP1 and DTP3: High coverage (>97%), estimates based on national reports; challenged by data issues in some years.
• Pol3: Averaging 96-99%, estimates supported by national data but inconsistent with surveys in 2016-2017.
• MCV1 and MCV2: Coverage high (>98%) in most years; data challenges include stock-outs and recall bias in surveys.
• Other vaccines (e.g., HepB1/B3, Hib3, RCV1, HepBB): Coverage generally high, with administrative data and surveys providing support; estimates challenged by data reliability, such as reported doses in outbreaks skewing coverage.

Common Challenges and Grades of Confidence

• Graded confidence (GoC) reflects data support: "•••" or "•" No "R+" or "S+" support indicates high challenge (e.g., "D-").
• Biases: Administrative data may be inaccurate; stock-outs (e.g., 2020 BCG) and survey inconsistencies affect some estimates.
• No uncertainty measures provided (e.g., confidence intervals); estimates used with caution.

Survey Details

For key years, surveys show coverage, often adjusted for recall bias, e.g., 2016-2017 DHS indicated lower coverage for some vaccines like Pol3 and MCV1. Data source: Maldives Demographic and Health Surveys with years 2015-2016 and 2008-2009, samples around 393-822 children aged 24-35 months.