Dr Emma Harding-Esch is an epidemiologist, with a focus on diagnostics and public health research for neglected tropical diseases (NTDs) and sexually transmitted infections (STIs). She is Associate Professor at the London School of Hygiene & Tropical Medicine (LSHTM), and Chief Scientist for Tropical Data, supporting countries worldwide to collect high-quality, standardised prevalence data, principally for trachoma. She represents Tropical Data as an observer of the International Coalition for Trachoma Control (ICTC), and is co-chair of the WHO NTD Diagnostic Technical Advisory Group (DTAG) cross-cutting sub-group on surveillance, and chair of the DTAG trachoma sub-group. She is also a member of the NTD NGO Network (NNN) WASH working group, NNN Conflict & Humanitarian Emergency working group and the ICTC Hard to Reach Populations task team.