Where do the numbers come from?
The numbers on variants of the coronavirus originate from the RIVM. The data is available as open data.
- Download the csv-file with the open data from the RIVM on coronavirus variants
- View the description of the dataset from the RIVM on coronavirus variants
How are the numbers generated?
In the Netherlands, the RIVM conducts research on variants of the coronavirus. This is done in pathogen surveillance. The RIVM started this at the end of 2020. The RIVM investigates a sample of samples and sequences (obtained via SeqNeth-SARS2) of positive test results that it receives from various laboratories in the Netherlands every week.
The figures that we show on the dashboard are derived from the pathogen surveillance research. Performing the research, preparing the samples and processing the data takes time. The figures for the last week are not complete. The data shown may therefore still change.
Numbers may differ per week compared to previous publications. This may be due to new insights and variant classifications. Data may not be complete in the last weeks and may be supplemented with a next publication. The data on the dashboard is adjusted retroactively.
- Read more on the RIVM's website about variants of the coronavirus
- Read more about the RIVM's pathogen Surveillance
Which variants are shown on the dashboard?
The graphs on the dashboard only show the variants that we receive from the RIVM and that the RIVM considers important for the dashboard. The variants that are not shown separately in the graph are listed in the category ‘All other variants’.
What are the limitations of the numbers?
The figures on variants of the coronavirus are based on a part of the positive test results. With low numbers of samples, there is a greater chance that not all variants will be found.
Furthermore, the figures are intended to give a national picture. Any differences between regions and groups are therefore not visible.