Coronadashboard data explained
- Coronadashboard data explained

The corona vaccination

Where do the numbers come from?

The data about the corona shot has been updated on 17. January 2024 for the last time with data up and untill 31. December 2023.

RIVM delivered the data on the number of vaccine doses administered. The figures on the total vaccination coverage in the Netherlands are the figures that RIVM provided to the European Center for Disease Control (ECDC). The ECDC shows the corona figures per EU country. The figures on the vaccination rate per municipality are available as open data.

Autumn round of corona vaccination 2023
The autumn round was intended to protect people who are at a higher risk of becoming seriously ill from corona during the period when many viruses are circulating. By getting the corona shot in the autumn, you ensure that your immune system is up to standard again in the winter. This is expected to provide you with the most health benefits.

The corona vaccination will remain available for:

  • Pregnant women;
  • Adults and children from high-risk medical groups (for example people with a serious immune disorder) on the advice of a treating physician;
  • People who have received a referral from a treating physician for a reason other than those mentioned above.

The dashboard shows how many people received this vaccination against corona. This corona vaccination is not part of the basic series.

Basic series of corona vaccinations
On this dashboard we show how many people have had part of the basic series and how many people have had all of the basic series of corona vaccinations.

The basic series as of October 1st 2023 includes:

As of the autumn round of 2023, no distinction will be made between the basic series, booster or repeat vaccinations. It is all called the corona vaccination.

Because almost everyone has already built up resistance to corona due to previous infections and/or vaccinations, 1 corona vaccination is sufficient. This includes people who have not previously been vaccinated against corona.

Until October 1st 2023, the basic series included the following:

  • they had 1 injection of the Janssen vaccine, or
  • 2 injections (BioNTech/Pfizer, Moderna, AstraZeneca or Novavax), or
  • they had 2 injections of different vaccines, or
  • they have had corona and 1 injection

People with a serious immune disorder have been offered a third injection. For this group, the third injection is part of the basic series.

Since March 14th 2022, the GGDs and other implementers have registered the number of people who have had a Novavax vaccine. Novavax is a protein vaccine. This vaccine is an alternative for people who do not want, or who should not receive, an mRNA vaccine or vector vaccine for medical reasons. Novavax is available for people aged 12 and over.

Repeat injection against corona
Everyone aged 12 years and older could receive a repeat shot against corona in the autumn of 2022 with updated vaccines to prevent a resurgence of the coronavirus.

People with a higher risk of becoming seriously ill from corona and healthcare workers with patient or client contact were the first to be treated from September 19, 2022. After that, anyone aged 12 or over who wanted one could receive a repeat injection as a precaution when it was their turn.

This was possible from 3 months after the last corona injection or corona infection. In order to receive the repeat injection, the basic series of corona vaccination had to be completed.

The repeat injection against corona could:

  • protect against serious illness, hospitalization or death due to corona;
  • help prevent the healthcare system from becoming overloaded;
  • help to keep businesses, catering establishments and gyms open, among other things, because fewer people became ill.

Basic series + 1 vaccination (previously booster injections)
The booster program (basic series + 1 vaccination) started on November 18th 2021, previously called the booster.

The dashboard showed what percentage of the groups 18 years and older and 12 years and older had received a booster vaccination.

The booster was given 3 months after the last injection and was intended to maintain high protection against corona. The number shown was the total number of booster injections administered by the GGD and by other providers (such as hospitals and nursing homes).

From November 18th 2021, the GGD registered how many booster shots were given (at the GGD locations and by other providers such as hospitals) and passed this on to the RIVM. In addition to the GGDs, other providers (such as hospitals) also administered booster injections. Until Tuesday, January 1st 2022, the number of booster injections administered was estimated by these other providers. Since this date, the actual number of booster injections administered has been shown.

The booster vaccination rate for the 12-and up population in the Netherlands was shown as of March 24th 2022. The booster vaccination rate for 12 to 17 year olds was no longer shown as of May 12th 2022 because a separate category did not add enough to the data on the 12-and up population.

Vaccination rate per age group
This table showed what percentage of all people in an age group have completed the basic series of corona shots and what percentage have also had a repeat injection.

No data is shown for the 5 to 11 year old age group (empty bar) because it is not offered to them (these children are eligible for the basic series).

Third corona vaccination
People with a serious immune disorder have been offered a third injection. For this group, the third injection is part of the basic series. After this third injection as part of the basic series, this group was also eligible for a booster injection and a repeat vaccination.

From October 6th 2021 to March 31st 2022, the GGD kept track of how many third injections were administered. As of that date, this will no longer be tracked because almost everyone in this group has now had the opportunity to get a third injection. A total of 133,380 people received a third injection until March 31st 2022.

Basic series + 2 vaccination (formerly repeat injection)
From February 28th 2022, people aged 60 and over and specific groups were eligible for a repeat vaccination (basic series +2 vaccination), previously called a repeat vaccination.

The dashboard showed how many people have had a repeat vaccination. Certain groups of people could receive a repeat injection 3 months after their booster injection. These included people over 60, people with Down syndrome, people with a serious immune disorder and residents of nursing homes. This repeat injection was intended to restore protection against corona. The repeat injection was not part of the basic series of corona injections.

How are the numbers calculated?

Vaccination rate
The RIVM calculates the data on the total national vaccination rate to date on the number of corona injections administered, because the reported injections in the COVID Vaccination Information and Monitoring System (CIMS) were previously not complete. Because the vaccination rate is partly based on calculations, the actual vaccination rate may be slightly different.

The data on the vaccination rate per age group, and the vaccination rate per municipality originate out of the CIMS. The RIVM registers in CIMS how many people have partially had the basic series of injections and how many people have had the entire basic series.

If the vaccination rate in a certain population group is very high or very low, this can be traced back to individuals. For privacy reasons, the dashboard therefore shows 'more than 95%' or 'less than 5%' instead of a precise percentage in those cases.

Vaccination rate per age group and per municipality and number of people who have had a basic series of corona injections are actually higher
The vaccination rate per age group and per municipality is actually higher than shown on the dashboard. This is because CIMS only registers the injections given to people who have given permission for this registration.For readability, the dashboard uses rounded numbers for the vaccination rate per age group and per municipality. All numbers are calculated down.

Waiting time after last administered
The basic series of corona vaccinations is completed on the dashboard immediately after the last injection. The dashboard therefore does not take into account the waiting time after the last corona injection. In the Netherlands, there is a waiting period of 4 weeks for the Janssen vaccine and a waiting period of 2 weeks for other vaccines. Only then does the vaccination provide sufficient protection against corona.

Adjustments and corrections

Change in age groups of vaccination rates
Since July 6th 2022, RIVM has adjusted the age groups for monitoring the vaccination campaign to make it easier to monitor the groups that are eligible for a repeat injection, for example. Example: the age group 61-70 has changed to the group: 61-69 years.

Correction of number of people in basic series completed
Since November 11th 2021, people who have had corona and one injection will be included in the number of people who have had the basic series of corona injections in the 'Vaccinated people' graph.

Vaccination rate
New RIVM calculation method
Since January 19th 2021, the RIVM has published a weekly update with figures on the number of vaccinated people in the Netherlands. The vaccination figures were previously based on the number of injections that the GGD registered in the CoronIT registration system. This number was supplemented with the number of vaccines delivered to general practitioners, hospitals and institutions (i.e. providers other than the GGD).

The vaccination rate based on these delivered vaccines had to be estimated until May 24th 2022. This is because the registrations were not complete. The RIVM can now calculate vaccination data more accurately. The new method uses the national COVID Vaccination Information and Monitoring System (CIMS) as the basis for the vaccination figures. The RIVM supplements the registered vaccinations in CIMS with GGD vaccination data that is not in CIMS. For the other implementers, this supplement is calculated based on the GGD data. We take into account that one injection after a corona infection also counts as a completed basic series.

In addition, the RIVM now uses more up-to-date population figures. Until May 24th 2022, the RIVM calculated with population figures from January 1st 2020. This corresponded to how the European Center for Disease Control (ECDC) worked with population figures. The figures are now updated quarterly by the RIVM. The RIVM no longer includes vaccinated people who have died or emigrated. As a result, the vaccination rate of the Dutch population had to be adjusted downwards slightly.

The vaccination figures are mainly lower because deceased and emigrated people are no longer counted, and because the population data have been updated. The new calculation method, which no longer uses an estimate based on injections delivered to hospitals, institutions and general practitioners, has less influence.

The RIVM's calculation method for population figures has consequences for the 'Vaccinations over time' graphs on this dashboard. This graph shows the number of injections in the past. Because the RIVM adjusts the figures retroactively, as of January 1st 2020, the new RIVM figures differ from this graph. Therefore, the graph will not be updated at this time as of May 24th 2022.

Vaccination rate Janssen vaccine
From September 22nd 2021, people who have had an infection and have had one injection (other than Janssen) will count as 'had a basic series of injections' in the figures per municipality and per age group. As a result, the figures increased as of that date. In addition, on the same date, a number of injections with the Janssen vaccine that were counted double were removed from the data. As a result, the vaccination rate per age group decreased slightly.

Improved data
The GGD has removed canceled or failed vaccinations from the data. The GGD has also made corrections to the different types of vaccines. About 160,000 vaccines have been removed from the dataset. The improved dataset includes the figures up to August 9th 2021. This was updated on the dashboard on August 10th 2021.

Update vaccination data July 2022
The latest population data is used for reporting once every quarter. The current population data from July 2022 was used for the mid-July 2022 report. The age groups have also been adjusted and the age calculation has been adjusted to 2022 minus year of birth. These adjustments ensure that vaccination rates become slightly lower. The vaccination rate of the basic series decreases by 1% due to the adjustments.

Injections given
From November 11th 2021, it is no longer possible to estimate how many vaccines have been administered for a 1st or 2nd round administered by providers other than the GGD (for example institutions or hospitals). The reason for this is that the estimate of the number of 1st and 2nd injections administered is based on the number of vaccines distributed (doses delivered to general practitioners). With the distributed vaccines, no distinction is made between the vaccines for the 1st and 2nd injections and the vaccines used for the booster injection. It is therefore assumed that other providers will no longer administer 1st and 2nd injections from November 11th 2021.