There are now five cases of the highly infectious delta strain of Covid 19 confirmed.
One of them is a nurse at Auckland City Hospital, where internal lockdown measures are now under way.
The first case detected in Auckland yesterday is a 58 year old Devonport man, who also travelled to the Coromandel.
It's still unclear whether the cases are linked to people coming over the border, and genomic sequencing is underway.
The entire country is at alert level four.
But is this hard, fast lockdown going to be enough to get on top of the virus?
Susie speaks with WHO advisor and Professor of Epidemiology at the University of New South Wales, Mary-Louise McLaws.
Auckland Central Photo: RNZ / Jordan Bond
