"WHO South-East Asia Region: The Immunization and Vaccine Development (IVD) unit of the Department of Communicable Diseases of the World Health Organization (WHO), Regional Office for South-East Asia (SEARO), has been producing the Expanded Programme on Immunization (EPI) factsheets for all Member States of the South-East Asia (SEA) Region and the Region annually. The primary data sources of the EPI factsheet are the WHO-UNICEF Joint Reporting Form (JRF) and the SEA Region annual EPI reporting form (AERF), in which each country officially reports EPI and vaccine preventable diseases related core information annually. The EPI factsheets 2024 are based on 2023 data reported to WHO SEARO by Member States..."