Last updated 2:00 pm, 24 September 2020
A significant COVID-19 cluster is when there are ten or more cases connected through transmission and who are not all part of the same household. The cluster includes both confirmed and probable cases.
Public health staff quickly follow up confirmed cases as soon as they are identified. Following up confirmed cases quickly and isolating close contacts works to contain clusters and prevent the disease spreading any further. All clusters are being investigated and managed by public health officials.
Significant clusters in New Zealand
There is currently one open cluster in New Zealand, currently known as the ‘Auckland August cluster’. Data specific to this cluster is available below.
|Age Group||Number of Cases||Percent of Cases|
|0 to 9||23||13%|
|10 to 19||37||21%|
|20 to 29||30||17%|
|30 to 39||26||15%|
|40 to 49||25||14%|
|50 to 59||23||13%|
|60 to 69||8||4%|
|Ethnicity*||Number of Cases||Percent of Cases|
Note: Prioritised ethnicity classification is used for reporting purposes. Each case is allocated to a single ethnic group based on the ethnic groups they have identified with, which are, in order of priority: Māori, Pacific Peoples, Asian, MELAA (Middle Eastern / Latin American / African) and European/Other. This means that if a person identifies as being Māori and New Zealand European, the person is counted as Māori.
|Cluster under investigation||Location||Total to date||New cases in last 24 hours||Current active cases||Origin||Status*|
|Auckland August cluster||Auckland||178||0||28||Under investigation||Open|
|Hospitality Venue||Matamata||77||0||0||Overseas exposure||Closed|
|Aged residential care facility (1)||Christchurch||56||0||0||Unknown||Closed|
|Aged residential care facility (1)||Auckland||51||0||0||Unknown||Closed|
|World Hereford Conference||Queenstown||39||0||0||Overseas exposure||Closed|
|Ruby Princess Cruise Ship Cluster||Hawke’s Bay||24||0||0||Overseas exposure||Closed|
|Aged residential care facility (2)||Christchurch||19||0||0||Unknown||Closed|
|Group travel to US||Wellington||16||0||0||Overseas exposure||Closed|
|Group travel to US||Auckland||16||0||0||Overseas exposure||Closed|
|Aged residential care facility||Waikato||15||0||0||Overseas exposure||Closed|
|Aged residential care facility (2)||Auckland||13||0||0||Overseas exposure||Closed|
Source: EpiSurv 09:00 24 September 2020
The criteria for determining transmission of a cluster to be closed has been reviewed and updated:
*A cluster is considered closed when there have been no new cases for two incubation periods (ie, 28 days) from the date when all cases complete isolation.