Those who may have attended classes at Les Mills takapuna around the same time as a case of Covid-19 are being asked to stay home and call healthline.
The call comes on the same day the country will - once again - find out if it's moving up, down or staying at the same Covid-19 Alert Level.
Auckland - the epicentre of the second outbreak - has been at Level 2.5 for two weeks now while the rest of the country sits down a notch at Level 2.
Cabinet will meet this morning to make the decision, but as Anneke Smith reports, it may not be as simple as looking at the numbers.