Auckland remains at alert level two for another fortnight with the rest now at alert level one.
But head of the Pacific Expert Advisory Group, Dr Colin Tukuitonga, warns mass gatherings are where the spread of the virus takes place.
Tukuitonga said people should continue to follow the appropriate health advice.
"Even though we're now at level two, if people can avoid big gatherings, I would because say there was a stray case out in the community, a mass gathering runs the risk of spreading that," he said.
