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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Colorado continues to release ‘older cases’ on a biweekly basis, which will cause spikes on release dates. These updates will occur until all older cases have been reviewed and reported. The next spike is expected on Thursday, June 9, 2022.
On May 12, 2022, Colorado showed a case spike due to inclusion of backlog: 7,810 older (>30 days old) cases were included on this day. Moving forward, the state will be including older cases in their updates every two weeks. More details here: https://covid19.colorado.gov/press-release/cdphe-to-release-a-batch-of-past-cases-from-the-winter-omicron-surge
On May 3, 2022, Colorado reported a backlog of deaths data.