NOTE: Masschusetts Department of Public Health: "PLEASE NOTE: Today’s case numbers include 680 cases tested by one Massachusetts based laboratory prior to December 1. The delay in reporting was caused by a technical issue with the software used by that laboratory’s reporting vendor" [source]

NOTES:

Arizona reported 10,322 new cases today, a portion of which was reallocated by Worldometer to the preceding date, Nov. 30 (when an unusually low number of cases, 822, were reported), based on the following statement released by the Department of Health Services: "This large number of newly reported cases is a result of the extended four-day weekend. Most days, local health agencies review and classify newly reported cases (identifying them as confirmed, probable, or not a case). They will follow up with healthcare providers and laboratories if there are any questions about details on a case, which may take additional time over the holidays. The confirmed and probable cases identified are then reported out on our dashboard the next day as the number of new cases. With the long weekend, classification was delayed for a large portion of cases, resulting in much higher numbers than usual. 
It is important to note that these newly reported cases were from specimens collected over the last week and are not all from yesterday. Reviewing the Confirmed COVID-19 Cases by Day section of the COVID-19 dashboard will provide better context for when cases have occurred" [source]

Louisiana Department of Health: "Due to a recent processing error, some COVID-19 data that would have been reported November 29-30 is being reported today." [source]

Alabama: "Case counts and deaths reported on today's update are high. Today's increase represents a delay in reporting to the Alabama Department of Public Health (ADPH) due to the holiday weekend." [source]

Texas: "Testing data will be delayed today and will be updated as soon as it is available. All data not relying on testing has been updated" [source]