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JHU has stopped collecting data as of

03 / 10 / 2023

After three years of around-the-clock tracking of COVID-19 data from...

By Region

Data Notes

General Notes

September 14, 2021

  • Reduced counts in U.S. cases and deaths are the result of states and territories not reporting the information for some or all of the weekend. Those states and territories are: Alaska, Colorado, Connecticut, District of Columbia, Florida, Georgia, Guam, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Massachusetts, Michigan, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Hampshire, New Mexico, North Carolina, Northern Mariana Islands, Oklahoma, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, U.S. Virgin Islands, Virginia, Washington, West Virginia, Wisconsin, and Wyoming. Typically, these states" Monday updates include the weekend totals.

Region Notes

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April 29, 2022


  • As of April 5, Wyoming has shifted to once per week reporting.

March 22, 2022


  • As of March 11, Wyoming has shifted to twice per week reporting on Tuesdays and Fridays.

April 8, 2021


  • Declines in U.S. cases and deaths that appear in the Coronavirus Resource Center’s data on Mondays are the result of several states not reporting the information over the weekend. Those states are: Alaska, Connecticut, Idaho, Kansas, Louisiana, Michigan, North Carolina, Oklahoma, Rhode Island, Tennessee, Washington and Wyoming.

November 18, 2020


  • On November 25, 2020, our test data source, the Covid Tracking project, started collecting Total PCR tests (specimens) from the "Wyoming Updates" section of Wyoming's COVID-19 page and started collecting Positive tests PCR (specimens) and Negative tests PCR (specimens) from the values in the graph on the "Laboratory Results by Date" graph on their COVID-19 State and County Dashboards page. At the same time, they backfilled all three of the above time series based on the numbers from the second page, summing the positive and negative numbers to use for the historical totals.

    This resulted in an increase in the total tests denominator.