There is nothing specific for Coronavirus as it isn't an issue for NZ at the moment. The seasonal flu will have a bigger impact so it would be more important to prepare for this. — Chris Anderson
While no case have been reported so far in NZ, there are now 5 confirmed cases in Australia - so it is not unlikely to be a potential issue here as well.
Given the incubation/infectious periods are much different to influenza an approach similar to measles may be more appropriate - e.g. identifying potentially infected people and apply quarantine periods (from the last potential infection contact) until no signs of infection is confirmed.
The hard part is knowing if someone has potentially been infected (and part of this is to get people to understand and think where they could of been infected) - again take measles as an example, commonly we see news regarding the discovery of a person infected with measles traveling by airplane and the call for anyone on the same flight to consider quarantining themselves from others that are at a high risk from a measles infection.
As for the original question, my suggestion would be to: provide employees with good information on how they can get infected, where they may have been infected and what to do if they think they may have been potentially exposed to an infected person. Where they may have been infected will initially be as the school have said so far - traveled to China or any of the affected countries, or who have been in contact with a person who has confirmed Coronavirus; but as more information comes to light updated to include travel on specific flight numbers etc.
If they think they might be infected - instructions to stay away from work, call in to discuss with management, and then plan for how to initially deal with potentially up to 2 weeks away from work while we wait to see. If they have come to work and potentially infected others this creates a bigger issue so at first the important thing is to get the info out there with the message that we'd rather a missed day or 2 while we check things out if we're not sure than to risk it and have to quarantine a much larger portion of staff.