Report of the fourth meeting of the WHO Diagnostic Technical Advisory Group for Neglected Tropical Diseases virtual meeting, 26–27 October 2021

This report documents the fourth meeting of the WHO Diagnostic Technical Advisory Group for Neglected Tropical Diseases, held virtually on October 26-27, 2021. The meeting focused on evaluating and advancing diagnostic tools for neglected tropical diseases (NTDs) in line with WHO's roadmap for 2021-2030. Key topics included updates on diagnostic tool development, laboratory capacity strengthening, and the establishment of new subgroups targeting specific diseases such as visceral leishmaniasis. The report also highlights the achievements and ongoing efforts in the diagnostic landscape, including the creation of target product profiles (TPPs) and resource mobilization strategies. Dedicated to Dr. Mwelecele Ntuli Malecela, the report underscores her impactful leadership in NTD control. Intended for healthcare professionals, researchers, and policymakers, the report aims to facilitate coordinated efforts and inform stakeholders about advancements in diagnostics for NTDs.