However low vaccination take-up in Katherine - only 71 people turned up for jabs on Wednesday - has authorities concerned.

The lack of new positive cases did not mean the Territory could "presume it means we have trapped the virus".

"The next days will remain crucial," Mr Gunner said.

"This is Delta. It is in large, vulnerable households - we're not out of the woods.

Other news

"We are still waiting for a lot of tests to return from Robinson River and we are expecting to get those results this afternoon."

A new close contact exposure site of the BP Service Station in Katherine from November 13 from 2.40-4pm was announced, with anybody at the business at that time told to isolate and get tested.

There are now 384 close contacts in the most recent cluster in Katherine and Robinson River. Of these 288 close contacts have been contacted and are isolating while 201 contacts have returned a negative test..

Katherine's MacFarlane Primary School close contacts have risen to 38 - 10 adults and 28 children.

The number of positive cases in the Territory remains at 19, with all of the known cases from three houses, Acting Chief Health Officer Dr Charles Pain said.

It is unlikely that the outbreak would will be contained to these households, he said.

A total of 686 COVID tests were done in Katherine on Wednesday and additional capacity has been added for pop-up testing at Eastside and a roving clinic. A further 60 tests were completed at Borroloola.

About 173 tests were completed in Robinson River on Wednesday, with all residents now having been tested for COVID-19. Forty-one close contacts from Robinson River are in quarantine at the Centre for National Resilience (CNR) in Howard Springs, with an additional eight people to be transported on Thursday.

A new pop-up clinic has been set up in Katherine at the Youth Outreach Building in the Eastside Shop Complex and will be open Thursday from 10am - 6pm and Friday from 8.30am - 6pm with bookings required.

The Katherine Hospital Pandemic Clinic (Drive-Through Testing Site) is open daily from 9am to 10pm, again bookings are needed but the Katherine walk-in COVID testing clinic will run daily from 8.30am - 6pm without the need for an appointment

An additional lane has been added to testing at the Katherine High School and people were being urged to be patient.

Other news

"I know there's delays there this morning but again, please understand that it's important that you get tested so stay in the line and if you are heading there, just take adequate supplies so you can stay in the vehicle."

The low rate of vaccination is being looked at, with access issues and testing being looked at as having an impact.

"I have seen a photo of a queue to our clinic [today]," he said.

"It may be that yesterday people were prioritizing testing and that this will shift to vaccinations today."

Police commissioner Jamie Chalker said they had anecdotal feedback that transport was part of the problem of people getting to vaccination centres.

"So the incident management team based in Katherine has been tasked with trying to pick up that issue and have that resolved very quickly," he said.

The Katherine Times has removed the paywall from our stories relating to health warnings and safety of the community in regards to the coronavirus. However, we depend on subscription revenue to support our journalism. If you are able, please subscribe here. If you are already a subscriber, thank you for your support.