On November 23, 2021, South Africa reported a large backlog of 77,157 antigen tests. These historical antigen tests have resulted in the addition of 18,586 positive antigen cases to our data for November 23, 2021. Please see this explanation from the South African Ministry of Health: We will investigate a back distribution, but caution expectations that we will be able to back distribute these as instances such as these rarely have appropriate metadata to accurately and fairly back distribute.
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.