Thousands of users accessed the new calculator on its initial day of launch.

Researchers in the Homeland Security Department’s Science and Technology Directorate recently produced and continue to update a predictive modeling tool that forecasts the natural decay of SARS-CoV-2—the virus that causes COVID-19—on surfaces under relevant temperature and humidity conditions.

The SARS-CoV-2 Natural Decay Calculator pulls insights from in-progress research efforts conducted by S&T’s National Biodefense Analysis and Countermeasures Center. And while it doesn’t directly offer specific guidance, the interactive resource is intended to support response and re-entry efforts and officials’ decisions regarding courses of action to pursue within the facilities they’re responsible for.

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