Frequently asked questions

This dashboard contains various figures that provide information about the development of the corona virus in the Netherlands. Here we answer frequently asked questions about the figures and graphs on this dashboard.


Where is the source data available for security regions?
Since when are the security regions no longer shown on the dashboard?
What is the explanation of 'Value of' and 'Obtained on'?
How are the numbers per 100,000 inhabitants calculated if fewer than 100,000 people live in a municipality?
What variants of monitoring a virus exist?

The corona vaccination

Will the dashboard also give information about the vaccines’ side effects?
Why don't you display figures on confirmed cases and hospital admissions for people who have been vaccinated?
Can you show how many people (in a certain population category) have been vaccinated and what the vaccination coverage is?

Reproduction number

What data is the reproduction number (R) based on?
Why is the reproduction number not recent?

Virus particles in wastewater

Why do the wastewater measurements show several municipalities?

View on patients

Why do I see a gray bar on the 'Patients over time' graph?
Why are the figures still being changed or updated?
Why don’t you show how many people have been discharged from hospital?