2022-07-05-世界卫生组织-Immunization_Barbados_2022_country_profile_16页_364kb

Immunization Coverage Estimates for Barbados (WHO and UNICEF, 2022)

Overview

The report provides estimates of national immunization coverage for Barbados based on data from 2010 to 2021, utilizing sources such as national reports, administrative data, surveys, and interpolations. Coverage assessments include various vaccines, with confidence levels (GoC) indicating the strength of empirical support. Many estimates lack supporting surveys and face challenges such as data reliability issues or reported program interruptions, leading to cautious interpretation. The next revision is scheduled for July 15, 2023.

Key Findings by Vaccine

BCG Coverage

• Years with Data: 2010-2021. No estimates available in these periods.
• Confidence Levels: Not applicable.

DTP1 and DTP3 Coverage

• DTP1 (2010-2021): Coverage ranged from 83% to 99%, with low confidence (GoC = D- or challenged).
  • Challenges: Data primarily from government reports, no recent surveys, program issues like stockouts.
  • Trends: Declined in 2021 after a dip in 2018; 2014 supported by survey data (GoC = R+ S+ D+).
• DTP3 (2010-2021): Coverage similar to DTP1, with fluctuations (e.g., 82-97%), often challenged.
  • Challenges: Interpolation used where data sparse, stockouts noted; high confidence in 2014-2015.

Pol3 Coverage

• 2010-2021: Coverage ranged from 84% to 95%, generally high but often challenged.
  • Challenges: Relys on government data, no surveys; confidence based on reported data (GoC = ••• or challenged).

IPV1 Coverage

• 2010-2021: Estimates started in 2016, with coverage from 83% to 99%.
  • Introduction: IPV began in 2015 as part of polio-endgame strategy.
  • Challenges: No surveys, confidence varies; 2016+ based on government data, challenged.

MCV1 and MCV2 Coverage

• MCV1 (2010-2021): Coverage 77%-99%, frequently challenged due to data issues.
  • Key events: Stockouts in 2018-2019 led to discrepancies; 2014-2015 supported by survey data (GoC = R+ S+ D+).
  • Trend: Areas with higher confidence show stability.
• MCV2 (2010-2021): Similar range (70-97%), confidence inconsistent.
  • Confidence: Often assigned based on consistency, with challenges in data sources.

RCV1 Coverage

• Based on MCV1 estimates (no separate data), with similar trends and challenges.

HepB and HepBB Coverage

• HepBB (Birth Dose, 2010-2021): No data available; confidence levels not provided.
• HepB3 (2010-2021): Coverage 77-97%, often challenged by government data alone.

Hib3 and RotaC Coverage

• Hib3 (2010-2021): Coverage 82-97%, similar to other vaccines, with no surveys.
• RotaC (2010-2021): No data available; default position in estimates.

PcV3 Coverage

• 2010-2021: Ranged from 78% to 99%, with high confidence in later years but no empirical data for earlier periods.
  • Confidence: 2010-2011 no accepted data; 2014-2015 supported by survey.

Data Reliability and Recommendations

• Confidence Levels: GoC ranges from high support (•••) to no empirical data, reflecting uncertainty.
• Challenges: Many estimates rely on government data without verification, stockouts, and administrative issues noted; encouraged use of high-quality surveys.
• Overall Coverage: Generally high for recommended doses, but variability noted due to data limitations.

For detailed, year-specific data, refer to the sources cited.