After three years of around-the-clock tracking of COVID-19 data from...
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.
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Per reporting in March, the Massachusetts state government that revised their historical deaths by date of report using their new, more restrictive definition of COVID-19 deaths. On April 8, 2022, the CRC has merged in this correction. It revised all death counts after August 18, 2020 and until March 13, 2022 (the periods where the state could provide data). Deaths were lower in all instances. More details here: https://github.com/CSSEGISandData/COVID-19/issues/5615.
On March 13, 2022, Massachusetts" deaths data decreased by more than 3,700 as a result of the Department of Public Health's revision of the state’s definition of a COVID-related death.