The state requires declared hotspots to record 28 consecutive days without any unlinked cases before it will remove quarantine requirements for travellers.
Genome sequencing indicated mystery cases identified in Sydney s west on the weekend were linked to the Berala cluster.
However, the source of infection for the group – a man and his six close contacts – is still unknown, resulting in an ongoing contact tracing effort.
People who attended Auburn s Village Tavern on December 28, January 7 or last Wednesday, the Berala Hotel on December 30 or the Auburn Hotel last Tuesday have been asked to come forward for testing after cases attended while potentially infectious.