The Committee for Sydney on Wednesday called on the NSW government to enforce vaccine passports to ensure the community can open up safely.

"There is no reason why vaccine passports shouldn't start being used now across industries that are already open, such as in retail settings and essential workplaces," the group's chief executive Ehssan Veiszadeh said in a statement.

Two Dubbo schools have been closed today as COVID-19 cases have confirmed and the region is on alert that a snap lockdown could be coming.

Melburnians are facing an anxious wait for a decision on when the city's sixth lockdown might lift while further north Cairns residents will learn if they'll escape a snap lockdown sparked by two cases in the far north Queensland city.

Late on Tuesday night the health department said a confirmed case of COVID-19 had been found to be connected to a Melbourne paediatric specialist clinic.

Two big Victorian events were cancelled on Tuesday - the AFL Grand Final Parade and the Avalon Airshow.

The exposure site list grew to more than 270, including a second housing tower in Flemington.

Meanwhile Prime Minister Scott Morrison said he would do everything in his power to ensure Australians can celebrate Christmas around the table.

At the same time New Zealand is considering blocking unvaccinated Australians from travelling under the trans-Tasman bubble, according to declassified documents that will shape New Zealand's reopening to the world.

Put COVID aside for a a moment and watch Wally the impossibly small poddy lamb from Warnambool, who has survived despite all odds.