WA weighs Victoria, NSW quarantine rules

Western Australia could soon remove quarantine requirements for Victorians but a coronavirus outbreak in NSW is being closely monitored.

A cluster of cases in Sydney has grown to 21 after 10 new locally acquired infections were recorded on Tuesday.

Victoria meanwhile recorded no new local cases and was on track to ease further restrictions as it continued to emerge from its latest lockdown.

WA currently classifies Victoria as a "low-risk" jurisdiction. Anyone who has been there must quarantine for 14 days upon arrival in WA.

Premier Mark McGowan says that requirement will likely be removed by next week assuming Victoria remains on its current trajectory.

People who have been in NSW must isolate until they return a negative test, while anyone who has visited exposure sites must serve the full 14 days quarantine.

"We have a pretty strong arrangement in place for NSW currently but if we need to tighten it further, we will," Mr McGowan told reporters.

The premier said he was confident WA had adequate supply of the Pfizer vaccine to cater for demand among an expanded cohort that now includes people aged in their 50s.

WA currently gets about 28,000 doses per week, a figure which is set to increase to 35,000 by the end of July.

About five per cent of West Australian adults are fully vaccinated.

Mr McGowan said he believed it could take until the middle of 2022 for the national rollout to progress enough that overseas travel could safely resume.

"I think that's only possible when the vast majority of Australians are vaccinated or have had the opportunity to be vaccinated," he said.

The premier on Tuesday announced the Perth Royal Show would return in September after being cancelled last year due to the pandemic.

It will be partly underwritten by the state government through a $4 million funding boost to the Royal Agricultural Society of WA.

Tickets will be discounted by 25 per cent as part of an initiative aimed at helping the events industry to recover lost revenue.

The last remaining capacity limits across all venues will be removed from Wednesday under a transition to phase five COVID restrictions.