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This map shows the risk level of attending an event, given the event size and location.

The risk level is the estimated chance (0-100%) that at least 1 COVID-19 positive individual will be present at an event in a county, given the size of the event.

Based on seroprevalence data, we assume there are ten times more cases than are being reported (10:1 ascertainment bias). In places with more testing availability, that rate may be lower.

Choose an event size and ascertainment bias.

The COVID-19 Event Risk Assessment Planning Tool is a collaborative project led by Prof. Joshua Weitz and Prof. Clio Andris at the Georgia Institute of Technology, along with researchers at the Applied Bioinformatics Laboratory and Stanford University, and powered by RStudio.