[xxgreg]

Travel was open with Australia until the recent outbreak there. Using virus genome sequencing, this outbreak has been traced to a New Zealander who caught the virus in Sydney, and spent 2 weeks in a quarantine centre in Auckland.

It's not yet known how the virus escaped the quarantine centre. None of the quarantine centre staff have tested positive, despite being tested multiple times.

It's suspected that the transmission occurred by somebody walking near the hotel while the initial case was arriving, or in a fenced off outdoor exercise area.

6 people walked by on CCTV at this point. 4 have been contacted, but 2 haven't been identified.

Also worth noting, the border isn't completely closed. There is a steady stream of returning New Zealanders, and also exceptions for some workers. Everyone does a 2 week quarantine stay on entering the country. Some of these people test positive for Corona, but so far it hasn't escaped a quarantine centre. Looks like Delta is harder to contain.