Epigrass
Build and simulate metapopulation epidemiological models (SIR, SEIR, SEIS, SIS, SI) directly from your QGIS layers.
Epigrass for QGIS brings the Epigrass metapopulation simulation engine into QGIS.
Turn any loaded vector layer (municipalities, health zones, census tracts...) into a spatial epidemic model in a few clicks:
* Map layer columns to site name, population and geocode
* Build the connectivity network by shared-border adjacency, k-nearest neighbours, distance threshold, or from flow columns in the attribute table
* Choose a compartmental model (SIR, SEIR, SEIS, SIS, SI, continuous variants or a CustomModel.py) with parameter presets for common diseases
* Seed the outbreak by clicking a feature on the map, add vaccination campaigns and transport options
* Run the simulation with epirunner in an isolated Python environment managed by the plugin (QGIS's own Python is never touched)
* Watch the epidemic spread on your map: results are loaded back as styled GeoPackage layers and an animated temporal layer for the QGIS Temporal Controller
The plugin requires a one-time setup ("Environment Doctor") which provisions a dedicated Python >= 3.12 environment with Epigrass and checks that a Redis server (required by the Epigrass engine) is reachable, starting one automatically when possible.