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In 2010, global immunization partners posed the question, “Do new vaccine introductions (NVIs) have positive or negative impacts on immunization and health systems of countries?” An Ad-hoc Working Group was formed for WHO's Strategic Advisory Group of Experts on immunization (SAGE) to examine this question through five approaches: a published literature review, a grey literature review, in-depth interviews...
In collaboration with WHO, IMMUNIZATIONbasics analyzed 126 documents from the global grey literature to identify reasons why eligible children had incomplete or no vaccinations.The main reasons for under-vaccination were related to immunization services and to parental knowledge and attitudes. The most frequently cited factors were: access to services, health staff attitudes and practices, reliability...
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