2022-07-05-世界卫生组织-Immunization_Grenada_2022_country_profile_16页_350kb

Summary of WHO and UNICEF Immunization Coverage Estimates for Grenada (2021 Revision Introduction)

WHO and UNICEF provide joint estimates of national immunization coverage for various vaccines in Grenada, based on data from 2010 to 2021. Vaccines evaluated include BCG, DTP1/DTP3, Pol3, IPV1, MCV1/MCV2, RCV1, HepBB/HepB3, Hib3, RotaC, and PcV3. Estimates rely on national reports, administrative data, surveys, and WHO/UNICEF methods, with varying confidence grades indicating data support.

Key Findings

• Confidence Grades: Grades of confidence (GoC) range from • to •••, with ••• indicating strong support from multiple sources. Many estimates have high challenge markers due to data issues like lack of empirical support.

  • Example: BCG coverage (2010-2021) shows no data available, reflected in missing values.
  • DTP1 coverage is estimated at 79% in 2020 and 2021, but GoC indicates it is challenged due to reliance on reported data with potential inaccuracies.
  • Other vaccines (e.g., Pol3, MCV1) show fluctuating coverage, often around 80-99%, but many estimates are based on extrapolation or lack surveys, leading to low confidence.

• Data Issues and Challenges: Reports mention vaccine stock-outs (e.g., in 2020-2021) and implausible data points (e.g., values over 100%), which raise concerns about reliability. Administrative data is used, but it may be biased or insufficient.

• Recommendations: WHO and UNICEF stress the need for high-quality, nationally representative household surveys to verify coverage levels, especially where data is lacking. Use of estimates should be cautious due to potential inaccuracies.

General Note: The next revision is due July 15, 2023, and further data sources can be accessed online. For detailed per-vaccine analysis, refer to the full report.