It is wise to draw the attention of your employees with holiday plans to such negative travel advice. On the one hand to avoid infection; on the other hand to prevent them from being unable to return to work in time, for example because they have been in contact with sick people in the risk areas and for that reason may have to avoid contact with others for up to two weeks.

It should be noted that pursuant to their general duty of care, an increasing number of companies go further than the official policy, for example by allowing employees who have been in a risk area or have been in contact, directly or indirectly, with an infected person to work from home as a preventive measure, even if they do not have any symptoms themselves.

Negative travel advice is published on the official website of the Ministry of Foreign Affairs, where you can even download an app that keeps you informed of up-to-date travel advice (currently in Dutch only):

https://www.nederlandwereldwijd.nl/reizen/reisadviezen?utm_campaign=buza-wijsopreis-01-2020&utm_medium=search&utm_source=google&utm_content=ros-search-alg&utm_term=text-multi-device-cpc-performance

There is bound to be some discussion about who is responsible for being unable to work; in this regard, the question of within whose control this inability to work falls is relevant. In any case, properly informing the employees on your policy in this matter beforehand helps. The above information may be of use for this purpose.