New figures from the Australian Bureau of Statistics revealed 15 per cent of employing businesses had staff unavailable to work due to COVID-19 during February this year.
That's down from 22 per cent of businesses that reported disruptions during January, at the height of the Omicron wave.
The bureau's head of industry statistics John Shepherd said the impacts from the virus were shared across the business sector.
"Large businesses were more than four times as likely to report these absences compared to small businesses," Mr Shepherd said.
"Conversely, more small businesses reported they could not cover the hours lost using existing employees than large businesses."
The figures come in the wake of Western Australia's border reopening to the rest of the country, after nearly two years of restrictions.
Free travel is now permitted across all states and territories for the vaccinated.
Prime Minister Scott Morrison said despite concerns WA's health system wouldn't be able to handle large numbers of infections as it reopened to the country, the state's health system was prepared.
"There's been plenty of time to make sure that's the case, plenty of resources to support it," Mr Morrison told Perth radio station 6PR on Friday.
"I know (WA Premier Mark McGowan) will be taking the lessons from the east coast."
After he tested positive to COVID-19 earlier this week, the prime minister said he was recovering and in good spirits.
"I'm certainly better than the last couple of days, so I appreciate all the kind wishes," he said.
Opposition Leader Anthony Albanese said after months of being cut off from the rest of the country, Western Australia would see a surge in arrivals.
"You'll see tourists flock to Western Australia, because it's a great product. Because Western Australia is a beacon, it will draw people in here," he said.
"I wouldn't be worried about WA's tourism industry, it will pick up ... Australians look over here and they see a state that has done very well."
It comes as Australia's medical regulator issued a fresh warning not to buy rapid antigen tests that have not been approved for use in the country.
The warning was made following concerns some types of RATs were being repackaged or relabelled for sale without all the components inside.
The Therapeutic Goods Administration has also warned some retail outlets or online stores may try to sell kits unsuitable for use at home.
The administration has already approved 32 different types of rapid antigen tests for use in Australia.
"(Unapproved RATs) have not been assessed by the TGA, meaning they do not come with the same assurances of safety, effectiveness and quality as those that have met Australian regulatory requirements," the TGA said in a statement.
"Unapproved versions may not work as expected, or work at all."
There were a further 37 deaths recorded from COVID-19 in the past reporting period - 26 in Victoria, seven in Queensland and two in both South Australia and NSW.
NSW registered another 9466 cases on Friday, while there were 6545 in Victoria, 5336 in Queensland, 2047 in SA, 2137 in WA, 794 in the ACT, 660 in the NT and 937 in Tasmania.
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