Premier Gladys Berejiklian will be briefed on Tuesday on the rollout of the Pfizer COVID-19 vaccine which gets underway on Monday.

"The first doses will go to our quarantine workers," Ms Berejiklian said.

"We know the greatest risk to NSW of COVID at this stage, given we don't have community transmission, is a leakage from the quarantine system.

"So everything we can do to reduce the risk of the virus getting out to the community is what we should be doing at this stage," she said on Tuesday.

Meanwhile, people from NSW can now travel freely to every Australian state - including WA.

Travellers must still complete a G2G travel pass and undergo health screening and a temperature check upon arrival.

People travelling to WA who have been in contact with someone from a 'medium-risk' state, such as Victoria, are required by the WA government to self-quarantine for 14 days.

NSW Health continues to "strongly advise against non-essential travel to Victoria" and says people subject to the restrictions in Victoria should not be travelling to NSW unless permitted.

The five-day stay-at-home requirements in the order - applicable for anyone who arrived in NSW from Victoria since midnight on February 12 - is due to end at 11.59pm on Wednesday.

Those subject to the order are permitted to leave their place of residence if they have a reasonable excuse. This includes shopping for essential items, medical and other care and caregiving, outdoor exercise, emergencies and essential work.

For NSW residents living in the border region, the stay-at-home requirement does not apply. The border region is defined as the area covered by the border 'bubble' in place since last November.

A single case of COVID-19 was diagnosed in a returned traveller to NSW from 12,336 in the 24-hours to 8pm on Monday.

Australian Associated Press