New Zealand's number of confirmed and probable coronavirus cases reached 1210 on Wednesday.

Another 50 cases of coronavirus have been counted in New Zealand, bringing the total to 1210.

On Wednesday, director-general of health Dr Ashley Bloomfield there were 26 confirmed and 24 probable coronavirus cases identified in the past day.

There were now 282 people who had recovered from the virus, an increase of 41 on the day prior, and 12 people in hospital including four in intensive care beds

Joseph Johnson/STUFF People in their bubbles in the Sumner Beach, Christchurch, area on day 13 of the lockdown.

An increase in the number of tests run has continued. There were 4098 tests run on Tuesday, bringing the total to 45,000.

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Bloomfield said there was some concern about the 17 nurses, seven doctors, and three medical students who have been infected with Covid-19.

JASON DORDAY/STUFF Police come out of Nomads Backpackers in Fort Street. (file photo)

He said about a quarter of them have come back from overseas. More work was going on to work out if others had been infected inside or outside the workplace.

There had been concerned that people were still not being tested despite having Covid-19 symptoms and proximity to a cluster of the virus.

Bloomfield said this should not be happening. He had asked the medical officers of health who are overlooking the clusters to open testing up to asymptomatic close contacts of these pockets of the virus.

This should hopefully "ringfence" these clusters, he said.

Bloomfield said there would soon be more regional data available on Covid-19 testing and cases, allowing more certainty about when and how New Zealand can leave the lockdown.

Prime Minister Jacinda Ardern, also at the Wednesday press conference, said the high testing number and fewer confirmed cases in recent days was encouraging.

She said there were growing signs New Zealand was "turning the corner" on the virus. It was the lowest number of new cases in more than two weeks.

But Ardern would not confirm whether the Government had ruled out an extension to the lockdown. She said more data was needed to make that decision.