2022-07-05-世界卫生组织-Immunization_Sri_Lanka_2022_country_profile_16页_360kb

• Overview: WHO and UNICEF provide estimates of immunization coverage in Sri Lanka based on national government reports, survey data, and administrative records. The estimates have a Grade of Confidence (GoC) indicating their reliability.

• Key Vaccines and Coverage Trends:

  • For BCG, DTP1/DTP3, Pol3, MCV1/MCV2, RCV1, HepBB/HepB3, Hib3, and others, coverage rates were consistently high (e.g., near 99%) from 2010 to 2021, reflecting strong performance in routine immunization.
  • Some estimates drew support from national surveys, like the Sri Lanka Demographic and Health Surveys (e.g., 2006, 2000, 1999), which confirmed high coverage through card and recall methods.
  • Coverage dipped slightly in the late 2010s but remained strong overall.

• Private Sector Role: Administrative data from national sources indicated that services delivered through the private sector contributed to higher coverage levels in several vaccines during recent years.

• Data Methodology:

  • Estimates are based on varying data sources, adjusted for possible biases.
  • A GoC system assesses confidence: GoC=R+ D+ means high confidence based on reported and independent data.
  • Annual updates reflect changes in schedules (e.g., introduction and reintroduction of Hib-containing vaccines), with specific notes for inactivated polio vaccine (IPV) starting in 2015.

• Disclaimers:

  • All estimates should be used cautiously due to potential data biases.
  • Independent assessments, like district-level coverage reviews, are recommended for validation.
  • RCV1 and other specialized doses often rely on MCV1 estimates due to lack of direct data.

• Data Availability:

  • Additional information and estimates for prior years are accessible through WHO and UNICEF data resources (mentioned URLs).

Sri Lanka's immunization program shows high and stable coverage across most indicators from the reporting period, supported by consistent national reporting and supplemental surveys.