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Evaluation of testing-, quarantine and isolation strategies

The COVID-19 pandemic is having a profound impact not only on the health of individuals, but also on health systems and society as a whole. Non-pharmaceutical interventions (NPIs) are and will remain important measures to prevent transmission and limit deaths. Among the NPIs, isolating infected people and tracking and quarantining exposed contacts are essential to successfully contain the pandemic. Shortening the duration of quarantine and isolation increases the risk of the SARS-CoV-2 epidemic spreading.

On the other hand, strategies that combine quarantine with SARS-CoV-2 tests can help offset the disadvantages of shortening the quarantine. If well designed, they can offer similar or even more infection prevention benefits. Combined quarantine & testing strategies could therefore reduce the socio-economic burden of COVID-19. The COVIDStrategyCalculator was developed in order to be able to assess such strategies.
The software tool is intended to enable political decision-makers to make a rational assessment of various quarantine and test strategies, based on the reduction of the general risk of transmission. However, the tool should not be used for individual decisions.

The tool is freely available under the GNU Lesser General Public License (LGPL) v3 for Windows und Linux operating systems. Separate instructions for installing the software under Mac OS operating systems can be found at:


The software supports the rational assessment of population-wide strategies for quarantine and testing from an infection protection perspective. The software should by no means be used to make individual decisions.

Disclaimer of liability

We exclude warranty and liability for the software or its use.

Date: 24.11.2020