Explore the impact different types of mitigation strategies can have on outbreaks in secondary schools


The COVID-19 pandemic has led to school closures across the globe and affected over 1.5 billion students.1 As of December 1st, 2020, one in five students still remains affected by school closures. As a result, there is an urgent need to evaluate the effectiveness of mitigation strategies that can be used to reduce the risk of outbreaks in secondary schools and allow them to reopen for in-person learning.

The purpose of this model is to provide a scenario-simulating tool that, when used in concert along with other credible sources of information and data, can aid policymakers and administrators in their decisions around school reopening policies. 

This tool uses the SEIRS+ model and was developed in collaboration with modeling experts Carl Bergstrom and Ryan McGee from the University of Washington.


  1. 1.3 billion learners are still affected by school or university closures, as educational institutions start reopening around the world, says UNESCO. Published April 29, 2020. Accessed November 9, 2020. https://en.unesco.org/news/13-billion-learners-are-still-affected-school-university-closures-educational-institutions