Prime Minister Jacinda Ardern said Kiwis should not avoid public gatherings but the situation is currently under review.
The announcement came as Pasifika Festival organisers confirmed the March 14-15 Auckland event at Western Springs Park remains on track.
Speaking from Christchurch, Ardern was asked about major events coming up in the coming weeks, including events to mark the anniversary of the March 15 mosque attacks in Christchurch.
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"My advice is the same we would have during seasons of flu and cold. So if you're feeling unwell, stay at home. It's the best way we can protect every other New Zealander's health," Ardern said.