NSW Chief Health Officer Dr Kerry Chant has called for increased COVID-19 testing to be undertaken by communities predominantly in Sydney's West and South West to ensure there are no undetected chains of transmission despite the low risk.
"Our focus is particularly on Western Sydney and Southwestern Sydney, so as a special call-out to those communities, please come forward for testing - that will allow us to block any unrecognised chains of transmission," she said.
"We are more confident that the Avalon cluster has been brought under control and there's no evidence for about approximately 28 days we've had any detections of that case.
"We're confident that that outbreak has now been brought under control but we do need your ongoing assistance in ensuring there is no transmission related to the Berala cluster."
Dr Chant confirmed the state had recorded no new cases of community transmission for the 10th consecutive day.
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His situation has raised suspicion that he could be among the people who continue to shed the virus well after the infectious period.
That was the case for American tennis star Tennys Sandgren, who was allowed by health authorities to travel to Melbourne for the Australian Open, despite testing positive for COVID-19.
His medical evaluations showed that although his body was still shedding the virus, he did not represent a risk of contagion.
But Miller does not have the freedom or opportunity to undergo the same medical tests to show that he no longer represents a biosecurity risk, says Dr Sara Carrillo, an expert in public health policies at Monash University.
Gladys Berejiklian is urging more NSW residents to come forward to get tested.(James Alcock/NINE MEDIA) It is critical at this time in the response that we mop up any transmission chains, but also I would urge you to go about practising those COVID-safe practices, she said.
It was a message that was reiterated today by NSW Health s Dr Chatu Yapa, who warned it was very likely that COVID-19 is continuing to circulate in the community among people with mild or no symptoms. It is vital that we pick up every case of COVID-19 if we are to prevent further community transmission, and the best way we have of doing this is maintaining high testing numbers, she said.