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Police believe four-year-old Cleo Smith was snatched from her tent at a West Australian campsite and have offered a $1 million reward for information leading to her location.

Detectives have not given up hope of finding Cleo alive but admit all signs point to her having been abducted from the popular Blowholes campsite on WA's northwest coast six days ago.

A land search in the immediate vicinity of the campsite, north of Carnarvon, will wind down on Friday with the focus to shift to a criminal investigation.

"Given the information now that we've gleaned from the scene, the fact that the search has gone on for this period of time and we haven't been able to locate her ... it leads us to believe that she was taken from the tent," Detective Superintendent Rob Wilde told reporters on Thursday.

Cleo was last seen by her parents about 1.30am on Saturday. Her mother Ellie Smith has said she woke around 6am to discover Cleo was missing from the family's tent.

It has been confirmed the zipper on the family tent was found open to a height Cleo could not have reached, seemingly ruling out the possibility she wandered off on her own. Her red and black sleeping bag is also missing.

Acting police commissioner Col Blanch said an analysis of CCTV vision from a nearby shack had placed Cleo at the campsite on the night in question.

There have been hundreds of calls to Crime Stoppers, mostly relating to suspicious people in the area.

"This investigation is wide open," Mr Blanch said.

"We will consider any possibility ... we're hoping for answers from the community."

More than 100 police officers, as well as SES volunteers and army reservists, have been deployed to the land search in rugged terrain north of Carnarvon.

Homicide detectives have been assigned to the criminal investigation into her disappearance, dubbed Taskforce RODIA.

Supt Wilde said authorities were keeping an open mind in relation to whether Cleo may have been taken by someone known to her.

Police have not ruled out the possibility Cleo may have been taken across interstate borders.

"We've been in touch with all jurisdictions around Australia," Supt Wilde said.

"We want to get this information out there and if anyone Australia-wide has information that could be relevant to the investigation, we ask that they call Crime Stoppers."

Premier Mark McGowan on Thursday announced a $1 million reward for information which leads to Cleo's location or to the arrest and conviction of people involved in her disappearance.

"It's a very sad situation, a very difficult situation," the premier said.

"I just urge anyone who has any knowledge of the location of Cleo, please provide that information to police and ensure that we can provide some certainty and information to Cleo's loved ones and hopefully bring Cleo back safe and sound."

Investigators have spoken to up to 20 registered sex offenders in the Carnarvon area, but there are currently no suspects.

Detectives are also re-examining nearby shacks along the coastline as the search enters its sixth day.

The family are Carnarvon locals and are understood to have been camping in the same vicinity as people they knew.

Cleo's mother earlier this week said the little girl would never wander off on her own and someone must know where she is.

"She would never leave us, she would never leave the tent," Ms Smith said, describing Cleo as a beautiful and delicate girl with "the biggest heart".

© AAP 2021

Victoria is on track to reach its next major vaccination target ahead of schedule as Melbourne prepares to exit lockdown, meaning more freedoms are fewer than two weeks away.

The city will emerge from its sixth shutdown at 11:59pm on Thursday, five days earlier than planned after hitting its 70 per cent full vaccination target.

The regional town of Mildura will also exit its lockdown at midnight, a day earlier than planned.

Analysts predict the next target, 80 per cent double dose, may be reached by October 30, a week ahead of the original November 5 estimate.

At that point the metropolitan/regional border will come down, mandatory masks outdoors will be dumped, all retail reopens and up to 150 fully vaccinated patrons can be inside venues.

Acting Chief Health Officer Ben Cowie said the state has 500,000 second doses left to administer to get to 80 per cent.

"We are doing everything we can to hit our next vaccine milestone as quickly as we possibly can. But to also make sure that nobody is left behind," he said.

When stay-at-home orders are repealed, Melbourne residents will have spent 77 full days in their current lockdown, and a world record total of 263 days since the beginning of the pandemic.

Under new rules from Friday, people can leave their homes for any reason and travel anywhere within Melbourne, the 9pm curfew is scrapped and home gatherings of up to 10 are permitted.

Businesses including hairdressers, beauticians and hospitality will reopen for the fully vaccinated.

However, in a last-minute change to plans, all workers reopening to double-dosed patrons will need to be fully vaccinated themselves.

Hospitality venues now have the task of enforcing the vaccination status of both patrons and staff.

Terry Casey, owner of the Terminus Hotel in Wycheproof, which is participating in regional trials of the vaccine passport system, agrees with the change.

"You can't expect your patrons to be fully vaccinated and not have the staff," he told AAP.

"We had to have a chat to one staff member and say, until that changes you just have to seek employment somewhere else...or we're more than happy to take you back on board once you've been vaccinated."

It is unclear how the new rules will be policed, with the union saying officers will have to wait until the last minute to find out that detail from the government.

"Our members will be coming on shift tonight and wondering what to do. I don't blame Victoria Police for not having the answers to this," Police Association of Victoria secretary Wayne Gatt said.

Victoria Police said the state government is the leading agency for enforcement of the vaccination passport program and it will assist at the government's request.

If a public order response is required then Victoria Police will attend and investigate if necessary, a spokeswoman said.

Deputy Premier James Merlino told reporters on Thursday there are more than 100 teams of authorised officers making sure businesses "are doing the right thing", but did not comment on how it will be enforced.

Meanwhile, its expected Victoria will scrap quarantine requirements for fully vaccinated Australians arriving from overseas from the start of next month, bringing the state into line with NSW.

According to several media reports, cabinet ministers met on Thursday night to sign off the plan, which could come into effect as early as November 1.

Victoria notched up another grim milestone on Thursday, surpassing 1000 COVID-related deaths as it reported a further 12 fatalities and 2232 fresh local infections.

It is the state's second highest daily case tally of the pandemic.

Professor Cowie warned "thousands more cases" could emerge as the city reopens and urged people to continue to wear masks and socially distance.

© AAP 2021

Qantas boss Alan Joyce expects the group will have domestic flight capacity back at pre-pandemic levels by late January as more states and territories allow visitors.

Mr Joyce on Thursday was optimistic about providing more flights as Australia better controls the coronavirus with a vaccinated population.

"It looks like by Christmas we will have every state open except for Western Australia," he told a Flight Centre Travel Group conference.

"Western Australia will open up domestically hopefully early in the new year, we assume around February."

The carrier does not need the western state to re-open to reach pre-pandemic domestic capacity.

It is likely to return to that level by the end of January after adding more planes and routes this year to meet steady domestic demand. The airline continues flying within Western Australia.

"So we're starting to plan to get back to 100 per cent of our pre-COVID schedule domestically and by January be above that," Mr Joyce said.

"That's great news for domestic tourism."

Another boost for domestic holiday-makers came with this week's news that by December 17 at the latest fully vaccinated visitors will be able to enter Queensland without undergoing quarantine.

Elsewhere in the country, one of the routes which is traditionally among Qantas' busiest is about to welcome more travellers.

The current single daily flight from Sydney to Melbourne will increase to almost 15 per day in the first week of November.

Melburnians are enduring their last day of lockdown and Mr Joyce estimated there would be 30 to 40 Sydney to Melbourne flights daily by Christmas. There were 55 each day before the pandemic.

The airline boss expected the route would be close to its pre-COVID schedule by February, helped by the return of business travel.

For overseas travel, the carrier has brought forward available flights to London and Los Angeles after NSW announced it would quarantine-free international travel from November 1.

Flights to Canada, Singapore and Tokyo would be available for Christmas, Mr Joyce said.

About 10,000 Qantas employees remain stood down from work due to low travel demand.

© AAP 2021