Authorities are urging West Australians to be vigilant as the state recorded a total of five new local cases of COVID-19 since Saturday and reintroduced a mask mandate for Perth and the Peel region.
WA Premier Mark McGowan announced the mask mandate would come into effect at 6:00pm on Sunday after an additional three cases of the virus were recorded.
Earlier, WA Health announced two new cases, both of whom are contacts of previously confirmed cases, bringing the total number of new local cases reported since Saturday to five.
It comes as WA health authorities are urging people to continue using the SafeWA app following two local cases of COVID-19 recorded on Saturday.
Both of those cases are also believed to have been infectious in the community.
The two women who tested positive on Saturday are linked to existing COVID-19 cases, although the variant is not known.
U Natural Spa Therapy in Applecross was described as a "significant exposure risk" by WA Health on Saturday after it was visited by multiple COVID cases.
Anyone who was at the business between January 7 and 13 has been instructed to immediately get tested for COVID-19, quarantine for 14 days and ring the 13 COVID line.
Contact tracers expected dozens of people to have visited the business over that period, but SafeWA records show only 11 people checked in.
"Given the timeframe, WA Health needs to urgently speak with positive cases to identify further potential exposure sites in coming days," a spokesperson said.
Man charged over alleged use of another person's COVID certificate
Meanwhile, a 38-year-old man has been charged over allegedly using fake identification and proof-of-vaccination documents to enter the Crown Perth complex.
The man was permitted to enter Crown on Wednesday after providing a WA driver's licence and digital vaccination certificate on a mobile phone.
However, police allege the licence and certificate belonged to another person, and that the man gave a false name to Crown security staff and police officers.
Police have laid three charges, including failure to comply with a direction and providing false personal details.
The man is due to appear in Perth Magistrates Court on Wednesday, February 9.
'We need to slow the spread': AMA
Australian Medical Association WA branch president Mark Duncan-Smith said it was concerning people were not checking in.
"Intrinsic with opening up is the need to contact trace and to be able to still isolate people that come into contact with someone who's COVID positive," he said.
Mr Duncan-Smith said even once Omicron begins to spread widely through the community when borders reopen on February 5, contact tracing will be critical.
"We need to slow the spread because we don't want a massive spike, a tidal wave of bad cases that could flood our medical system," he said.
"This is a disease that we do not want to rip through our society, we want it to go slowly so our medical system doesn't get overrun."
Since the current outbreak began just before Christmas, Western Australians have checked into the SafeWA app an average of 1,580,548 times each day.
The peak number of check-ins over that time was on Christmas Eve, with 2,118,167 scans recorded.
Excluding Christmas Day, Boxing Day and New Year's Day, the lowest number was 1,280,194 on January 9.
Those numbers are all far below the peak of 2,479,002 check-ins each day in the first week the app was mandatory last year.
But it remains above low check-in rates that followed lockdowns in 2021.
'We should be helping each other'
In Perth's CBD, most people the ABC spoke to were happy to check in everywhere they went.
Jerraldine Lauricio, who works in one of Perth's hospitals, said it was disrespectful for people not to scan in.
"I know sometimes we're rushing to get the things that we want, to get into the shops or to eat," she said.
"If we can minimise it by checking in, so we can track and trace those people, do it."
Jennifer Fong and Felicia Siew said they aimed to check in everywhere they went and found it upsetting when other people did not.
"It's quite disappointing, being in WA we should be helping each other," Ms Siew said.
She said her friends had taken to adding each other to their SafeWA apps, meaning one person could sign all the others in.
Cooper Gray said he had to manually sign in due to issues with the app and found it frustrating to see people flouting the rules.
