Discrepancy between the total number of cases acknowledged by CM and the total uploaded to the national database
In each of its reports, CM updates the cumulative number of confirmed cases of covid-19 since the beginning of the pandemic. Daily and cumulative cases must be uploaded by CM to the national database to allow global analyses conducted by CCAES, as described in the government document titled Estrategia de detección precoz, vigilancia y control de COVID-19. Yet, on any given date, the cumulative number of confirmed cases that CM acknowledges in its reports exceeds the cumulative number that CM uploads to the national database. The upper part of Figure 9 displays the growth of the cumulative number of confirmed cases according to each of these sources. The lower part of Figure 9 displays how the difference between acknowledged and uploaded totals changed over time: The number of cases not reported to the national database generally increases over time. The deficit of notification to the national database started near the end of May 2020 and progressively increased with an abrupt but insufficient drop at the beginning of Nov 2020, after which the deficit continued to rise to a peak of over 15,000 cases in early Feb 2021 when the peak of the third wave had been reached (see Figure 8). Since then, the deficit slowly declined until early Mar 2021 and then rose again. In mid Dec 2021, when the sixth wave started to hit (see Figure 8), the deficit of notification rose again quickly to a peak of nearly 29,000 cases in early Feb 2022, after which the deficit declined quickly.
Tabs deficit reduction past the third wave and deficit reduction past the sixth wave describe how such reductions were achieved.