Related Experiment Video
Updated: Jan 21, 2026

Generation of Natural Killer Cells from Human Expanded Potential Stem Cells
Published on: January 13, 2023
The Expanded Program on Immunization in the English- and Dutch-speaking Caribbean (1977-2016): reasons for its
Karen N Lewis-Bell1, Beryl Irons2, Elizabeth Ferdinand3
1Immunization Advisor Pan American Health Organization Kingston Jamaica Immunization Advisor, Pan American Health Organization, Kingston, Jamaica.
Abstract:
The year 2017 marks the 40th year of the establishment of the Expanded Program on Immunization (EPI) by the Pan American Health Organization (PAHO), the regional office of the World Health Organization (WHO) in the Americas, the first WHO region certified as eliminating poliomyelitis (1994), measles (2016), and rubella and congenital rubella syndrome (CRS) (2015). The English- and Dutch-speaking Caribbean subregion of the Americas paved the way in eliminating these diseases. This report highlights the innovative strategies used in this subregion that helped make the EPI a success. A review of published/unpublished reports and written and oral accounts of the experiences of Immunization Advisors and national EPI managers was conducted to identify the strategies used to strengthen the Immunization program in the subregion since its implementation by countries in 1977. The results show that these include strong collective political commitment, country-specific immunization legislation, joint use of a standard coverage monitoring chart, annual meetings of national EPI managers, collaborative development of annual national Plans of Action for Immunization, coordinated implementation of vaccination campaigns, subregional oversight of surveillance and laboratory support, a performance award system for countries, and subregional standardized templates for immunization manuals and procedural guidelines. Political will and support for immunization has been particularly strong in this subregion, where 99% of EPI costs are borne by governments. Dedicated health staff and multi-country agreement and application of strategies have led to high sustained coverage and good-quality surveillance, resulting in the absence of wild polio for 34 years, measles for 25 years, CRS for 17 years, and rubella for 15 years.
Related Concept Videos
Reason and Intuition
Reasoning
Inductive reasoning involves deriving generalizations from specific observations. This type of reasoning helps form beliefs about the world. For example,...
Ecological Succession
Deductive Reasoning
For example, a researcher can deduce specific predictions...
Inductive Reasoning
Inductive reasoning is common in descriptive science. A life scientist makes observations and records them. This data can be qualitative or...
What is the Immune System?

