AUTHOR=Ochola Michael , Kiwuwa-Muyingo Sylvia , Bhattacharjee Tathagata , Amadi David , Ng’etich Maureen , Kadengye Damazo , Owoko Henry , Igumba Boniface , Greenfield Jay , Todd Jim , Kiragga Agnes TITLE=Harmonizing population health data into OMOP common data model: a demonstration using COVID-19 sero-surveillance data from Nairobi Urban Health and Demographic Surveillance System JOURNAL=Frontiers in Digital Health VOLUME=7 YEAR=2025 URL=https://www.frontiersin.org/journals/digital-health/articles/10.3389/fdgth.2025.1423621 DOI=10.3389/fdgth.2025.1423621 ISSN=2673-253X