Schools and businesses face an enormous challenge in determining how to establish an effective covid-19 testing program, particularly with the multiple testing options now on the market. 

An innovative online tool funded by the National Institute of Biomedical Imaging andBioengineering (NIBIB), part of the National Institutes of Health, helps organizations choose a covid-19 testing strategy that will work best for their specific needs. The COVID-19 Testing Impact Calculator is a free resource that shows how different approaches to testing and other mitigation measures, such as mask use, can curb the spread of the virus in any organization.

A team led by the Consortia for Improving Medicine with Innovation and Technology (CIMIT) at Massachusetts General Hospital and researchers at the Massachusetts Institute of Technology (MIT) developed the tool to model the costs and benefits of covid-19 testing strategies for individual organizations. The team developed their mathematical model and calculator as part of NIH’s Rapid Acceleration of Diagnostics (RADx) Tech program. 

The calculator is simple—a user enters a few specifics about their site and the tool produces customized scenarios for surveillance testing. The tool models four different covid-19 testing methods, including onsite and lab-based, and calculates the number of people to test each day. It shows the estimated cost of each testing option and outlines the tradeoffs in the speed and accuracy of each kind of test.

“The NIH RADx initiative has enabled innovation and growth in the creation of new, rapid COVID-19 testing technologies,” says Bruce J. Tromberg, PhD, director of NIBIB and lead for the RADx Tech program. “Using this tool, school administrators and business owners can quickly evaluate the cost and performance of different tests to help find the best match for their unique organization.”

“Providing schools and businesses with clear guidance on risk-reducing behaviors and testing helps them stay open safely, which is valuable for the economy and society as a whole,” says Nancy Gagliano, MD, leader of the RADx Tech Implementation Core. “There is nothing available like this in the country.”

The COVID-19 Testing Impact Calculator also shows how other Centers for Disease Control and Prevention-recommended countermeasures, such as masks, contact tracing, and social distancing, can work in concert with testing to keep people safe. Users enter which of these measures are in place in their organization and the tool integrates this information to produce testing recommendations. By adjusting these entries, users get a startling demonstration of how implementing simple countermeasures can drastically reduce their testing costs. For example, for a site that allows mask-less activities such as meetings or dining, reducing the group size on the calculator from 12 to six cuts the cost of the recommended testing strategy by more than half. Thus, the tool can inform leaders about how implementing these practices in addition to testing can keep their school or business open safely and with less expense.

“A false dichotomy is often perpetuated that we must either stop covid or reopen the economy,” says Anette Hosoi, PhD, associate dean of engineering and the Neil and Jane Pappalardo Professor of Mechanical Engineering at MIT. “But we know a lot now about how this disease spreads and the answer is not an either/or proposition. We know what kinds of measures are necessary to keep things running and mitigate the spread while operating—maybe not under normal conditions, but certainly under functional conditions.”

“The calculator is a major enabler for test-technologies being developed, commercialized, and deployed with help from the RADx Tech program,” says Paul Tessier, PhD, product development director at CIMIT. 

The COVID-19 Testing Impact Calculator is at

For more information about RADx and its programs, visit NIH.