Changes to the Service NSW app that came into effect at 9am today also mean that people can begin registering their positive rapid antigen test (RAT) results.

On Wednesday 681 new cases of COVID-19 were reported across the MLHD from PCR testing, up hundreds from yesterday's count of 269.

At a press conference on Wednesday morning NSW Premier Dominic Perrottet confirmed that people can now register their positive RAT results via the Service NSW mobile app.

Registering positive results will be mandatory from today, however people are encouraged to back-log their tests to January 1.

"This health order has been signed off this morning and in terms of enforcement, if someone fails to register a positive rapid antigen test there will be a $1000 fine," Mr Perrottet said.

A "grace period" has been put in place, however, with the fine being introduced from January 19.

Minister for Customer Service Victor Dominello said that people can also register dependents with a positive test result via the app.

"You can always go to the Service NSW website and access the form there," he told those who don't have the app.

"Alternatively you can call Service NSW on 13 77 88 and they will also provide assistance in relation to registering the RAT test."

Mr Dominello said that most people with COVID-19 will be able to recover at home, however those who register a positive RAT and are in a high-risk category will be contacted by NSW Health within 48 hours.

"What we're trying to do here in NSW is provide a comprehensive environment to not just register your RAT test but also to provide additional care as required," he said.

Wednesday was a record day for NSW's COVID-19 death toll - the third record set in less than a week - as 21 people died with the virus.

This is up 11 deaths from the previous day, with the number of people who lost their lives almost doubling from Monday to Tuesday.

Seven of the 21 deaths reported on Wednesday are historic deaths included in the tally following coronial investigations.

Across the state on Wednesday 34,759 new infections of the virus were reported from 134,411 PCR tests.

This is up from 25,870 new cases the day prior.

There are 2246 people currently in hospital across the state, and 175 patients in intensive care.

The MLHD this week released advice for the community around COVID-19 testing and isolation, and what to do if you become infected.

People who test positive for the virus with either a RAT or PCR must self isolate at home for seven days from the date of test, and tell your contacts (household, social contacts, workplace or school) that you've tested positive.

The MLHD said people can leave isolation after seven days if they don't have a sore throat, runny nose, cough or shortness of breath.

"You do not need to have a negative test to exit isolation," an MLHD spokesperson confirmed.

"Your household contacts must also self-isolate for [seven] days and have a rapid antigen test as soon as possible and again on day [six]."

IN OTHER NEWS:

NSW Health continues to urge anyone who is eligible to book in for a vaccine booster.

"People aged 18 years and over are eligible for a booster if they had their second dose at least four months ago," the department said.

"We urge people to get their booster dose as soon as they are eligible, to best protect themselves, their loved ones and the community from the ongoing transmission of COVID-19. We also strongly recommend that people aged 12 years and over who are severely immunocompromised have a third primary dose of vaccine from two months after their second dose."

Vaccination for children aged between 5 and 11 also began in NSW on Monday morning.

The federal government's online vaccine clinic finder can be used to locate a clinic and book a jab.

COVID testing sites are open in Wagga seven days a week at the MLHD's Murray Street clinic, between 8am and 4pm, and at the drive-through site at Wagga Showground between 7.30am and 12.30pm.

Laverty Pathology also operates a drive-through clinic in the Riverina Playhouse car park, off Cross and Tarcutta streets, between 8am and noon on weekdays.

Appointments are required for a COVID test at the GP-led respiratory clinic at Glenrock in Glenfield Park, where people can be tested between 9am and 5pm on weekdays.

The community is reminded to monitor for symptoms and if they occur, stay home and isolate until you can access a test.

For further testing locations across the region, go to www.mlhd.health.nsw.gov.au, or for help accessing a test, call the Murrumbidgee COVID-19 Hotline 1800 831 099.

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