Director general of health Ashley Bloomfield says there are no new cases of Covid-19 to report in New Zealand today.

He is also giving the latest update on the port worker who tested positive for Covid-19 last week.

It is the first community case in New Zealand since September 24.

Test results of close contacts of the port worker, including one workplace contact and two of four household contacts, had tested negative, Bloomfield said.

Two other household contacts were still awaiting test results.

He said the most likely source of infection was a ship he worked on in Auckland.

The ship travelled from Brisbane to Tauranga and then to Auckland, where eight crew joined it from the Philippines.

The man had worked on the ship while it was in Auckland. He was wearing PPE while working on board.

The ship then went to Noumea and is on its way to Brisbane.

Bloomfield said he was interested to see if any workers on board will test negative.

A second ship, which only operated in NZ waters and with only a NZ-based crew, was also a possible source of infection.

That ship is currently anchored off Napier and all 21 workers on board are being treated as close contacts.

Crew members are receiving daily health checks, Bloomfield said.

Genomic sequencing said the strain of Covid-19 has not been previously seen in New Zealand and was not linked to the recent August outbreak, he said.

Pop up centres were being set up in Auckland and in Taranaki for people to be tested if they wanted. Staff in hotels where the man stayed in New Plymouth were also being tested.