The reason for this is the strongly increasing corona virus infections in the provinces of South Holland and North Holland, especially in the cities of Amsterdam, Rotterdam and The Hague.
That is why both Belgium and Germany issue codes red for the Dutch provinces. Belgium also asks people from Gelderland, Noord-Brabant, Utrecht and Flevoland to undergo preventive testing upon arrival in Belgium and to go into quarantine for 14 days. The Belgian government’s testing and quarantine advice no longer applies to travelers arriving in Belgium from the Dutch province of Zeeland.
The German Robert Koch Institute (RKI), the equivalent of the Dutch RIVM, published an updated list of corona risk areas on Wednesday, why the Dutch provinces of South and North Holland are listed. Usually, shortly after classification as a risk area, a corresponding travel warning from the German Ministry of Foreign Affairs follows. Such a travel warning goes further: although it is not a ban, it must have a significant deterrent effect. However, it also has a positive side for consumers: it allows travelers to cancel bookings free of charge.