A child who tested positive for Covid-19 is expected to be among new virus cases announced in NSW on Boxing Day, as health authorities battle to contain the Sydney outbreak.
Seven new cases linked to the city's Northern Beaches outbreak were announced on Christmas Day as Australians gathered for Covid-safe celebrations.
NSW Health said the Avalon cluster had reached 108 cases. A child who tested positive after the 8pm Thursday cut-off will be among the new coronavirus cases announced on Saturday.
The health department also issued a new alert on Friday afternoon flagging that 10 Sydney locations, four buses and a flight to Griffith had been visited by people infected with Covid-19.
Authorities are most concerned about anyone who was at Chicago Jones Coffee & Chocolate Maison in Auburn on Sunday and passengers on the 2.10pm Regional Express flight from Sydney to Griffith on Monday.
There's also growing concern about a potential cluster in the Sydney CBD centred on the Paragon Hotel near Circular Quay, with Santa photos at the QVB one of the locations flagged in the alert.
Health authorities are also concerned about the possibility of another Sydney CBD outbreak emerging, with three cases connected to the Paragon Hotel Sports Bar at Circular Quay.
NSW Premier Gladys Berejikilian warned people to avoid the CBD if they could on Boxing Day, and if they could not to wear a mask.
"We'd prefer people did not go to the CBD because then you have people from all over Sydney coming to one location, and it only takes one or two cases for it to then spread everywhere else," she said.
NSW Health also issued a new alert on Friday afternoon flagging infection risks at 10 Sydney locations, four buses and a regional flight.
Nine cases were recorded for NSW on Christmas Eve, one more case than the day prior.
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