New Zealand has no active cases of coronavirus after the recovery of the last person identified by health authorities with COVID-19.

Prime Minister Jacinda Ardern says she "did a little dance" of joy with daughter Neve when she learned New Zealand was COVID-19 free.

On Monday, Kiwi health authorities reported the recovery of the country's last confirmed case, as well as no new cases for the 17th straight day.

The mighty milestone coincided with Ms Ardern abolishing COVID-related restrictions, returning New Zealanders to the same freedoms they enjoyed before the arrival of the virus.

"Moving to level one (restrictions) is the dividend of everyone's hard work," Ms Ardern said, who is fond of referring to her 'team of five million' New Zealanders.

New Zealand's COVID-free status is also a significant step on the road to elimination of the virus, which should be confirmed next week.

"This is really good news for the person concerned, and it's also something the rest of New Zealand can take heart from," NZ's Director General of Health Ashley Bloomfield said.

Almost 300,000 tests have been carried out in New Zealand, where 1504 have contracted the virus and 22 have died.

New Zealand recorded its first case of COVID-19 on February 28, prompting the government into firm and fast action against the deadly virus.

On March 23, when cases numbered 100 for the first time, Ms Ardern imposed a strict lockdown which would last 51 days.

That lockdown kept Kiwis inside their houses, except for trips for health reasons or the supermarket.

Australia did not enact such tough restrictions and still has over 400 active cases.

New Zealand will maintain strict border controls and contact tracing to ensure it can contain any future waves.

"We are not immune to what is happening in the rest of the world," Ms Ardern said.

"But unlike the rest of the world, not only have we protected New Zealanders' health, we now have a head start on our economic recovery.

"That's because at level one, we become if not the most open then one of the most open economies in the world."

Upon learning of the last case recovery, Ms Ardern said she danced around her lounge room.

"I did a little dance ... I showed Neve and she was caught a little by surprise but she joined in having absolutely no idea why I was dancing around," she said.

The New Zealand government has also ended its state of national emergency, though many emergency powers remain with authorities after legislation passed last month.

Michael Baker, Professor of Public Health at the University of Otago, said the move to level one restrictions was "only the first battle in what will be a long-term war against this virus".

"This risk will rise again in New Zealand as we gradually increase the numbers of incoming travellers. It will also rise during the coming winter when coronaviruses are more transmissible," he warned.

Debate will now shift to the re-establishment of regular travel across borders, with Ms Ardern pledging to open Australian travel first, but only when it is safe to do so.