# mrc-ide/covid-sim

This is the COVID-19 CovidSim microsimulation model developed by the MRC Centre for Global Infectious Disease Analysis hosted at Imperial College, London.

Repository: https://github.com/mrc-ide/covid-sim
Canonical: https://ross.abutalabs.com/products/covid-sim
Language: C++
License: GPL-3.0
License Family: copyleft
Last push: 2023-02-21T12:22:31+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2353, "days_push": 1289, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1234, forks 248 (observed 2026-08-28T04:04:04.760048+00:00)

## What it is
CovidSim is a C++ microsimulation model of COVID-19 transmission developed by Imperial College London's MRC Centre for Global Infectious Disease Analysis. It simulates how intervention policies and healthcare provision affect epidemic spread to produce quantitative forecasts of cases, deaths, and hospitalisations.

## Use cases
- simulate covid-19 spread in a structured population
- forecast cases deaths and hospitalisations under intervention policies
- model effects of social distancing on epidemic outcomes
- model other respiratory viruses like influenza with parameter changes
- run stochastic epidemic simulations with multiple seeds

## When to choose
- you need policy-relevant epidemic forecasts for COVID-19 or similar respiratory viruses
- you want a spatially and socially structured individual-level disease model
- you can provide the RAM and parameter inputs required for large-scale runs

## When to avoid
- you need a supported, stable tool - the code is released with no support and changing interfaces
- you want a simple or small-scale model - UK runs need ~20GB RAM and some regions up to 256GB
- you need endorsed outputs - only Imperial College's own generated outputs are endorsed

## Facets
- artifact type: application
- maturity: maintenance
- function: simulation, cli, math
- domain: healthcare, simulation, data-science
- platform: windows, cpp, cli, cross-platform
- tags: epidemiology, covid-19, microsimulation, infectious-disease-modeling, public-health, openmp, scientific-computing, linux

## Member repositories
- mrc-ide/covid-sim (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:04.760048+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:22:11.285922+00:00, confidence not recorded.
  - readme: https://github.com/mrc-ide/covid-sim (fetched 2026-08-28T04:04:04.760048+00:00, sha 4d8755c2021f)
- Data as of 2026-08-30T08:39:29.467469+00:00.