Deficit reduction past the third wave
Deficit reduction over the period marked in gray in Figure 10a (between Feb 9th and Mar 9th, 2021) is the result of CM adding to the national database known cases that had not been uploaded in due time. The dates on which those cases occurred can be determined by comparing the cell contents in the national database as of Feb 9th, 2021 with those updated as of Mar 9th, 2021. Figure 10b shows such differences in cell contents for each and all days between May 1st, 2020 and Feb 9th, 2021. Deficit reduction thus arose due to the (late) addition to the national database of numerous known cases occurred since late Sep 2020.