Watch Covid-19 cases envelop the United States - CNN

The animation is based on county-level data collected by local governments and tracked by the Johns Hopkins University Center for Systems Science and Engineering.

An estimated 64 million cases have been reported in the United States since the pandemic started in 2020, a number that is about 19 percent of the population — though some people have had Covid-19 more than once.

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Data from Johns Hopkins University Center for Systems Science and Engineering each day from July 1, 2021 through January 13, 2022.

New cases that are missing or not assigned to a particular county are excluded.

Due to reporting anomalies, new case counts are omitted for counties in Nebraska from Sept.