A fully-vaccinated border worker has tested positive for coronavirus at Auckland Airport, sparking concerns about the trans-Tasman travel bubble agreement.

The country’s Ministry of Health said the worker had been placed into isolation.

“The usual protocol of isolating the case, interviewing them, and tracing their contacts and movements is under way,” it said in a statement on Tuesday.

“More information will be provided later today, and this case will be included in tomorrow‘s totals.”

There were 15 flight arrivals and 17 departures at Auckland Airport on Monday.

Health Minister Greg Hunt said he had been briefed by his New Zealand counterpart and Australia‘s chief medical officer.

Mr Hunt said the fact the worker had been fully vaccinated played a role in their assessment of the case and transmission capability.

“They‘re onto this,” Mr Hunt said.

“We have full confidence in New Zealand‘s system.

“We‘ve seen them deal with the inevitable outbreaks, and there will be other days when there are cases in Australia.”

It comes just a day after two-way travel between Australia and New Zealand – without mandatory quarantine – launched.

Nearly 400 days passed since international borders were closed off to prevent the spread of COVID-19.

There were emotional scenes on Monday as families from across the ditch finally reunited.

Victoria recorded one new infection acquired overseas on Tuesday.

There are 14 active COVID-19 cases across the state – all were in hotel quarantine.

The federal department of health has been contacted for comment.