Australia has marked another day with no locally acquired cases of Covid-19 as more stranded Australians prepare to come home when international arrival caps return to higher levels.
New South Wales, Victoria, Queensland and South Australia all announced zero local Covid-19 cases on Saturday in their respective 24-hour reporting windows.
Western Australia, which on Saturday exited its five-day lockdown after a hotel quarantine worker picked up the virus, also recorded no local cases.
Some 57,000 people in WA had been tested for the virus since Sunday.
The Victorian government on Saturday announced it had changed mask policies for hotel quarantine staff and would review hotel air flow, seeking to avoid a repeat of this weeks two suspected Covid-19 leaks.
Hotel quarantine staff in Victoria had since Thursday been required to wear a face shield and surgical mask while on the job. Staff were previously wearing only an N-95 mask.
Hotel quarantine organisers from Wednesday also established buffers between family groups and other guests, resulting in 140 rooms being taken out of the system, and staggered food delivery times.
The moves followed a case of suspected Covid-19 transmission among two separate groups of guests at Melbournes Park Royal hotel, and a worker at the Grand Hyatt testing positive to the coronavirus.
Victoria will increase its weekly hotel quarantine capacity to 1,310 from 15 February as a month-long national slowdown on arrivals concludes.
From 15 February NSW will return to a cap of about 3,000 people a week, while Queensland is reverting to 1,000 and SA to 530.
WA will retain its halved cap of 500 until the end of the month.
The prime minister, Scott Morrison, announced the increased caps after a national cabinet meeting with state and territory leaders on Friday.
The return to more arrivals having been briefly paused due to the emergence of the contagious UK and South African virus strains will coincide with the commencement of the Australian vaccination program.
Hotel quarantine workers, frontline staff and border officials are first in line for the Pfizer coronavirus jab, along with the elderly and most vulnerable.
The head of the Department of Health, Brendan Murphy, said the risk of the virus leaking from hotel quarantine would reduce once its workers have had the jab. State borders could then also be relaxed on a lasting basis.
While he was hesitant to give a possible time frame for when Australias international border restrictions would ease, Murphy said officials would keep a close eye on how well the population was protected after vaccinations.
Progressively over the second half of this year we should see a trajectory towards normality, he told a parliamentary inquiry on Friday.
The government hopes most Australians will be vaccinated by late October. Australia has secured more than 150m doses of various vaccines.