2022-07-05-世界卫生组织-Immunization_Gambia_the_2022_country_profile_28页_412kb

Gambia: WHO and UNICEF Immunization Coverage Estimates Summary (2021 Revision)

The document provides detailed estimates of national immunization coverage in The Gambia based on data from WHO and UNICEF. These estimates are derived from national reports, surveys, administrative data, and expert reviews, and cover various vaccines including BCG, DTP, MCV, Hib, HepB, PCV, RCV, Polio, RotaC, and YFV. The estimates are updated annually, with the 2021 revision available on July 8, 2022.

National Immunization Schedule and Methodology

WHO and UNICEF use empirical data, admin data, and surveys to estimate vaccination rates for each vaccine dose. The Grade of Confidence (GoC) is assigned to assess the quality of the data underpinning the estimates. However, these estimates do not provide confidence intervals, nor do they include subjective assessments of uncertainty in the estimates.

The Coverage of the Vaccines for the Gambia for 2021 are:

1. BCG: Percentage of births receiving one dose of the Bacillus Calmette-Guerin vaccine.

   • Data from 2015 to 2021: Fluctuating between 92% and 99%.
   • GoC often supports the estimates with R+, D+, and S+ support.

2. DTP1: Percentage of surviving infants receiving one dose of diphtheria, tetanus, and pertussis-containing vaccine.

   • Source: Administrative data from the Ministry of Health and annual surveillance updates.
   • 2021 Estimate: 82%

3. DTP3: Percentage of surviving infants receiving three doses of diphtheria, tetanus, and pertussis-containing vaccine.

   • 2021 Estimate: 85%
   • Challenges from survey data in 2020.

4. MCV1: Percentage of surviving infants who received at least one dose of measles-containing vaccine.

   • 2021 Estimate: 88%

5. MCV2:

   • Percentage of children who received a second dose of measles-containing vaccine according to the nationally recommended schedule.
   • 2021 Estimate: 67%

6. Hib3: Percentage of surviving infants receiving three doses of Haemophilus influenzaetype b vaccine.

   • 2021 Estimate: 85%

7. HepB1: Percentage of births receiving one dose of hepatitis B vaccine within 24 hours of delivery.

   • Data only available from 2021 onwards.
   • 2021 Estimate: 25%

8. HepB3: Percentage of surviving infants who received three doses of hepatitis B-containing vaccine.

   • 2021 Estimate: 86%

9. IPV1: Percentage of surviving infants who received at least one dose of inactivated poliovirus vaccine.

   • 2021 Estimate: 81%

10. Pol3: Percentage of surviving infants receiving three doses of polio-containing vaccines (IPV or OPV).

    • 2021 Estimate: 89%

11. RotaC: Percentage of surviving infants who received the recommended doses of rotavirus vaccine.

    • 2021 Estimate: 79%

12. PCV3: Percentage of surviving infants who received three doses of pneumococcal conjugate vaccine.

    • 2021 Estimate: 83%

13. YFV: Percentage of surviving infants who received one dose of yellow fever vaccine.

    • 2021 Estimate: 78%

Data Source and Quality

• Most estimates are based on interpolated administrative data or survey-based evidence between available years.
• When survey data is present, adjustments are made for recall bias.
• GoC may challenge some estimates where data limitations exist, such as missing year data or possibilities of stock-out affecting reporting.
• All displayed estimates should be used cautiously and contextualized to the specific purpose of the analyses.

Data Sources

• Official 2022 Data Source: WHO and UNICEF
• Report Date: July 8, 2022
• Publication Date: July 8, 2022

For additional details, refer to the official sources:

WHO Immunization Data

UNICEF Immunization Data