Auckland is this morning adjusting to a "new new normal" - level 2.5 living - as Prime Minister Jacinda Ardern apologises for a wrong message which urged all 750,000 south and west Aucklanders to get a Covid test.

She told Mike Hosking today she was "angry, frustrated... a range of emotions" after a social media post - on Facebook and Instagram - from the official all-of-Government Covid-response page said residents needed to get a test, even if they did not have symptoms.

"It was a mistake, I fully acknowledge that," Ardern told Hosking.

She said the message - which she had learned about at 10am yesterday morning - had led to people lining up at testing stations yesterday, unnecessarily.

"The issue here is that in simplifying some of the messages they have shared incorrect messages. No excuse for that. It caused anxiety for people and for that I apologise. No wants to see people afraid. No one wanted to see people unnecessarily lining up."

She said she would be taking time to find out what happened. "It feels to me a little bit at the moment that I don't think we can place blame on any one person's shoulders. It's a series of errors have been made here."

She said she had raised it immediately with those who had the ability to remove it from the social media platforms - even though the message was still up on Instagram as she spoke at the 1pm press conference yesterday.

"If we wanted over 700,000 people to get a test we wouldn't just leave it to an Instagram or Twitter post. That would be something we would be sharing openly from the podium."

The apology comes as Auckland is this morning out lockdown and into another "new normal" - with roadblocks lifted and masks donned for public transport commuters and many workers.

But concerns still remain as the cluster that plunged the city into level 3 continues to grow.

• Comment: NZers should be 'incredibly angry' at the Govt over incorrect Covid messaging
• 'Incredibly angry': PM fumes over 'wrong' message on Covid testing

Ardern warned that she expected the Auckland cluster to get larger and that the tail of new cases "will be long".

Instead of moving Auckland straight from level 3 to level 2, Ardern announced Auckland would be in a state she described as "level 2.5".

This is being welcomed by epidemiologist Michael Baker, who said it was a "good move," given the fact the cluster will continue to grow.

But he warned that there was some level of uncertainty as to whether level 2.5 would be enough to contain this outbreak.

Despite this, the move out of lockdown will come as welcome news to many Aucklanders, businesses in particular, who have been in level 3 for close to 20 days.

However, moving out of lockdown comes also comes with a level of uncertainty and some apprehension, especially from parents sending children back to school and day care.

This is because there is still community transmission of Covid-19 in the city and Ardern is warning that new cases will continue to be reported.

There were just two new cases of Covid-19 in the community yesterday – both linked to the Auckland cluster, which is now 135 people.

Ten people are in hospital, two of whom are in ICU.

Last time New Zealand, as a whole, came out of level 3 there had been no community transmission cases in almost two weeks.

Despite this, director of public health Caroline McElnay argued yesterday that the spread of the virus within New Zealand is under control.

"There may be some further cases that would continue to occur within the community, but our level of comfort with the control of the cluster is high."

Ardern said it was "highly likely" that proactive tests will reveal even more community transmission cases in the coming weeks.

And it is because the Auckland cluster continues to grow that the Government moved the city into, what she described as, level 2.5.

This is not an official alert level, rather a heightened version of the level 2 Auckland has already experienced.