Open epidemiology platform for Africa : OpenEpi rewrite in React/TypeScript with epidemic simulation, geospatial mapping, in-browser R IDE, and multilingual support including Mooré, Wolof, Swahili and Haoussa.
**Open Epidemiology Platform Built for Africa**
*« La connaissance est comme un baobab : une seule personne ne peut l'embrasser. »*
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## What is Wepisia?
Wepisia is a complete architectural rewrite of OpenEpi, the world's reference open-source epidemiology calculator rebuilt with modern web technologies and extended with capabilities the original never had: multi-region epidemic simulation, interactive geospatial mapping, an in-browser R IDE, and multilingual support for African languages.
Everything runs **locally in the browser**. No server. No installation. No data leaves your device.
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## Standing on Giants : a tribute to OpenEpi
> This project would not exist without the foundational work of the OpenEpi team. Their decision to release a complete, scientifically rigorous epidemiology toolkit under the MIT license made Wepisia possible. We owe them a profound debt.
**The OpenEpi Team**
**Primary Reference:**
> Dean AG, Sullivan KM, Soe MM. *OpenEpi: Open Source Epidemiologic Statistics for Public Health*, Version 3.01. www.OpenEpi.com, updated 2013/04/06.
**Peer-reviewed publication:**
> Sullivan KM, Dean AG, Mir R. OpenEpi: A Web-based Epidemiologic and Statistical Calculator for Public Health. *Public Health Reports*. 2009;124(3):471–474. DOI: 10.1177/003335490912400320
Every statistical result in Wepisia is validated against OpenEpi v3. Where the two tools differ on edge cases (small-sample CI approximations), the difference is documented and annotated in the interface.
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## What's New Beyond OpenEpi
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OpenEpi (2002) Wepisia (2026)
───────────────── ─────────────────────────────────────────
Static HTML/JS → React 18 + TypeScript + Vite
Desktop-only → Mobile-first, fully responsive
English-only → 6 languages incl. Mooré, Wolof, Swahili
No simulation → Multi-region SIR/SEIR/SEIRD/SEIQRD engine
No mapping → …