ArticlePLoS neglected tropical diseases2026
Country-level perspectives and priorities to guide the development of Invasive non-Typhoidal Salmonella (iNTS) vaccines: Insights from seven countries.
Article in PLoS neglected tropical diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Invasive non-typhoidal Salmonella (iNTS) disease typically presents as a non-specific febrile illness that can progress to bloodstream infections and carries a high case fatality rate. Early detection improves patient outcomes, however, in resource-constrained settings, limited diagnostic capacity leads to underdiagnosis, insufficient incidence data, and incomplete epidemiological and socio-economic research on iNTS. Although no licensed vaccines currently exist, several candidates are in pre-clinical and clinical development. In the early stages of vaccine development, it is essential to consider country-level perspectives and priorities to guide the development of novel vaccines. To support this, the World Health Organization's Vaccine Innovation Framework was applied to conduct a consultation with 40 stakeholders representing the national immunization programmes in Burkina Faso, Ghana the Gambia, the Democratic Republic of the Congo (DRC), Kenya, Malawi and Mozambique. The consultation aimed to assess the stakeholder perceptions on the need for an iNTS vaccine and to evaluate its desirability, suitability, and evidence requirements from a low- and middle-income country (LMIC) perspective. Stakeholders argued that although an iNTS vaccines is desirable, the lack of nationally available epidemiological data is a barrier to accurately understanding the disease burden. A novel vaccine would be more desirable if it aligns with the preferred product characteristics specified, and helps mitigate, rather than exacerbate, current immunization programme challenges. They also expressed a preference for combination vaccines that align programmatically, including formulations combining iNTS with typhoid conjugate vaccine (TCV), to reduce the number of injections and simplify delivery logistics. To make evidence-based decisions on potential introduction, stakeholders emphasized the need for robust data on the value and impact of iNTS vaccines.
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