As New Zealand makes its way through the nationwide alert level 4 lockdown, more becomes known about how far COVID-19 has spread within the community each day.
A total of 511 cases have been reported in this outbreak so far, 83 of which were announced on Sunday. There are 496 of these total cases in Auckland and 15 in Wellington.
While epidemiological or sub-cluster links have been found in 453 of these cases, 58 are yet to be found.
Here's a breakdown of the data on New Zealand's current COVID-19 outbreak and cases from the Ministry of Health and the Government.
Hospitalisations
Thirty-four people with the virus are in hospital - 32 in a stable condition in a ward and two in a stable condition in ICU. Seventeen cases are in Middlemore Hospital, 13 in Auckland City Hospital, three in North Shore Hospital, and one in Wellington Regional Hospital.
Close contacts
A total of 32,771 people have been identified as a contact. Of these, 26,473 have been followed up and 85 percent have been tested. There are 784 people classed as "very close" contacts.
Where people catch COVID-19
More than three-quarters of Saturday's 82 reported cases were contacts of already confirmed cases, Prime Minister Jacinda Ardern says. Additionally, over half of Saturday's infections were among households.
Just two people were considered to be infectious before level 4 restrictions came into effect almost two weeks ago and 25 people had exposure events outside of their household.
In this outbreak, transmission of COVID-19 has happened at 21 locations of interest out of the over 450, Ardern says.
Two locations that are of particular note are the Assembly of God church service in Mangere and Auckland University of Technology (AUT), where a total of 237 and 20 cases have been linked so far.
There has also been transmission among some workplaces currently open at level 4. Ardern says it might not be a problem with what is happening on factory floors, but what happens on either side of workers' shifts and during breaks. She warns that restrictions will be tightened further if it's needed.
How level 4 is limiting transmission
The lockdown has limited transmission of COVID-19 where now it's largely spreading within households. Director-General of Health Dr Ashley Bloomfield says they would expect transmission within there to be about 50 to 100 percent of contacts.
He also says that without the lockdown, New Zealand would be seeing "New South Wales-type" numbers.
"Based on the last three days of numbers, it's showing that the best fit is with an effective R of about 0.8," Dr Bloomfield says.
The R number is the average number of people that one infectious person will pass the virus on to.
Even though cases are connected to sub-clusters and are epidemiologically linked, Ardern warns that people need to stay vigilant since some cases are still under investigation.
Clusters
There are currently seven epidemiologically linked subclusters within this outbreak. The two largest clusters are the Birkdale social cluster that is linked to case A (68 confirmed cases) and the Mangere church cluster (237 confirmed cases).
All other sub-clusters have fewer than 20 cases.
Testing
On Saturday, 23,139 tests were processed in New Zealand. In Auckland alone, 9700 swabs were taken.
Sunday and Monday are expected to be busy testing days since many contacts' day 12 tests are due, the Ministry of Health says.
The seven-day rolling average of tests is 37,031.
