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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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June 22, 2022

United States

April 6, 2022

United States

  • The Coronavirus Resource Center temporarily displayed an incorrect increase in COVID-19 deaths and cases in the United States on Tuesday, April 5, due to the misplacement of Kentucky’s weekly totals into the daily update.

November 11, 2021

United States

  • On November 11, 2021, a number of locations did not update on November 11 in acknowledgement of local holidays. These include:

    U.S. States and Territories: Alaska; DC; Georgia; Guam; Idaho; Illinois; Louisiana; Massachusetts; Mississippi; Missouri; Montana; Nevada; New Hampshire; New Mexico; North Carolina; Northern Mariana Islands; Oklahoma; Oregon; Rhode Island; South Carolina; South Dakota; Tennessee; Utah; Virgin Islands; Washington; Wyoming

    International: Belgium

October 2, 2021

United States

  • On October 2, 2021, the CDC began reporting booster doses among Total Vaccine Doses for some states.

October 1, 2021

United States

  • The data for October 1, 2021, includes multiple days of reporting from Florida. Florida only reports COVID-19 data once per week via their COVID-19 Weekly Situation Report, and does not provide a daily back-distribution of Case or Death data. The CDC also supplies some daily reporting for Florida. While not all of Florida's Cases/Deaths were diagnosed/occurred on October 1, we are unable to break them out to dates within the week. This contributes to the unusually large number of daily cases for October 1 in the US.

September 30, 2021

United States

  • In September, 2021, the JHU Coronavirus Resource Center began collecting and reporting testing data for Florida and Alabama from Health and Human Services (HHS). These states ceased reporting cumulative testing counts publicly, resulting in the need to seek an alternative source. The HHS data undergoes retrospective reporting, so historic data may change from reported data.

September 25, 2021

United States

  • The data for September 24, 2021, includes multiple days of reporting from Florida. Florida only reports COVID-19 data once per week via their COVID-19 Weekly Situation Report, and does not provide a daily back-distribution of Case or Death data. The CDC also supplies some daily reporting for Florida. While not all of Florida's Cases/Deaths were diagnosed/occurred on September 17, we are unable to break them out to dates within the week. This contributes to the unusually large number of daily cases for September 17 in the US.

September 17, 2021

United States

  • The data for September 17, 2021, includes multiple days of reporting from Florida. Florida only reports COVID-19 data once per week via their COVID-19 Weekly Situation Report, and does not provide a daily back-distribution of Case or Death data. The CDC also supplies some daily reporting for Florida. While not all of Florida's Cases/Deaths were diagnosed/occurred on September 17, we are unable to break them out to dates within the week. This contributes to the unusually large number of daily cases for September 17 in the US.

September 11, 2021

United States

  • The data for September 10, 2021, includes the past week's worth of data from Florida. Florida only reports COVID-19 data once per week via their COVID-19 Weekly Situation Report, and does not provide a daily back-distribution of Case or Death data. While not all of Florida's Cases/Deaths were diagnosed/occurred on September 10, we are unable to break them out to dates within the week. This contributes to the unusually large number of daily cases for September 10 in the US.

September 4, 2021

United States

  • The data for September 3, 2021, includes the past week's worth of data from Florida. Florida only reports COVID-19 data once per week via their COVID-19 Weekly Situation Report, and does not provide a daily back-distribution of Case or Death data. While not all of Florida's Cases/Deaths were diagnosed/occurred on September 3, we are unable to break them out to dates within the week. This contributes to the unusually large number of daily cases for September 3 in the US.