The COVID Tracking Project - Homepage

"The COVID Tracking Project collects information from 50 US states, the District of Columbia, and 5 other US territories to provide the most comprehensive testing data we can collect for the novel coronavirus, SARS-CoV-2. We attempt to include positive and negative results, pending tests, and total people tested for each state or district currently reporting that data....

State Testing Data Release - Best Practices—Our recommendations on what data state public health authorities should be releasing, and how...."