COVID-19 measures

Update: 16 March 2023


Please check the website of the Dutch government for the latest news on COVID-19 measures. 

For our future visitors we have implemented the following safety measures and guidelines.

Precautionary measures
The Lorentz Center and Leiden University always follow the health advice of the National Institute for Public Health and the Environment (RIVM) and the travel advice of the Ministry of Foreign Affairs.

Follow the RIVM’s measures to avoid contracting or spreading the virus:

  • Wash your hands regularly with soap and water.
  • Use an alcohol-based hand sanitizer if soap and water are not available.
  • Sneeze or cough into your elbow or cover your mouth and nose with a tissue (not your hands). Dispose of tissues immediately and wash your hands.
  • Make sure there is plenty of fresh air.


Testing no longer necessary

From 11 March 2023, the RIVM's advice on testing for coronavirus infection and isolating after a positive test no longer applies. So, if you have COVID-19 symptoms you don’t have to do a test. But you should still keep following the general advice on this page.


What to do when you feel sick?
If your symptoms worsen, call your doctor or the local branch of the Municipal Public Health Service (GGD) instead. For Leiden, this is GGD Hollands Midden at 088 308 30 00.

Also see the information from the Dutch government.


Visiting the Netherlands
If you are travelling from abroad, please keep yourself updated via the websites of Netherlands and You and Netherlands Worldwide.


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Niels Bohrweg 1 & 2

2333 CA Leiden

The Netherlands

+31 71 527 5400