Figure 1: Number of reported positive tests per 100,000 inhabitants, by age group (13 December 2021 to 23 January 2022).

* There is currently a backlog in the daily number of positive COVID-19 tests reported by RIVM, compared to the actual figures reported by the Municipal Public Health Services (GGD). Numbers are currently so high that it is causing delays in sending the figures from the GGD system to RIVM. These figures do not include about 60,000 positive tests that were reported between 18 and 25 January 2022. A technical solution is being developed to catch up and eliminate this backlog, but it will take some time. The reproduction number based on reported infections may temporarily be too low due to the backlog, which will be corrected when the delayed reports have been incorporated.

** The NICE Foundation and the hospitals cannot yet distinguish between the number of patients who were admitted due to COVID-19 and the number of patients admitted to hospital who tested positive for SARS-CoV-2, but were admitted for another reason. They are working on a solution for that.