image: Map of United StatesCOVID-19 Simulator

The COVID-19 Simulator website has a collection of tools to help health policymakers and practitioners make decisions regarding policy, and strategy related to coronavirus disease 2019

COVID-19 Policy Simulator is an interactive tool to help policymakers decide how to respond to COVID-19 pandemic.

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Map showing the estimated COVID-19 immunity - proportion of the population with antibodies to COVID-19 by state.

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The COVID-19 Outbreak Detection Tool detects recent outbreaks in U.S. counties by leveraging machine learning.

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The COVID-19 Football Tracker displays NFL and NCAA football game-related info and outbreak data for the 2020 season.

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COVID-19 Doubling Time

The COVID-19 Outbreak Tool estimates the doubling time of SARS-CoV-2 in each county every week. The below video shows the changing COVID-19 doubling time for each U.S. county from October 25, 2020 to the latest week. Substantial heterogeneity in outbreaks can be seen over time across different states. The recent emergence of the Omicron variant shows a rapid spread of COVID-19 in all states, with many counties having a doubling time of less than 1 week.