The Belgian cabinet changed the travel advice for the Dutch provinces of North Holland, South Holland and Zeeland to orange on Saturday.
Belgians who have recently been in those three provinces are urged to be tested on their return and to quarantine for two weeks as a precaution.
The changed travel advice can be seen on the website of the Belgian Ministry of Foreign Affairs. The overview also shows that parts of France, Spain and Switzerland have even received red travel advice.
Earlier this week, the Netherlands gave orange advice to Antwerp, due to the increased number of corona infections.
See also: How is travel advice determined?