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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On February 28, 2022, Nebraska shows a spike in cases. We have yet to find official reasoning for the spike but have verified its accuracy, per the source.
Nebraska on Feb. 28, 2022 added reinfection data to its cases, spurring a 30,000 spike.
On October 30, 2020, our data source for test data, the Covid Tracking Project, changed its definition of the contents of its totalTestResults field for Nebraska. We use this data for our positivity calculation denominator. This will will likely reduce the state's positivity percentage because people are deduplicated people less frequently, resulting in a bigger denominator.