“Pleasingly, overnight we had one case of community transmission, it was a child in the household of existing cases,” NSW Premier Gladys Berejiklian said.

She said genomic sequencing results had also now confirmed that a man and woman in Mount Druitt who tested positive earlier in the week to COVID-19 were linked to the Berala outbreak.

More than 20,000 people were tested in the latest reporting period, which chief health officer Dr Kerry Chant said was a “critical” mark.

“It is critical we achieve over the 20,000 mark (daily),” she said

“I’m particularly urging people in the Greater Western Sydney area – so that picks up all of south western Sydney (such as) Liverpool, Fairfield, and Bankstown – to get tested.