Covid 19 Delta outbreak: What we know about Auckland’s mystery cases

Health teams seeking to take Auckland out of its strict level 4 lockdown have narrowed their focus to about three mystery Covid cases and seven key suburbs in a bid to assure themselves there is no undetected transmission in the community.

Currently, there are 10 new Covid cases from the last 14 days yet to be linked back to people known to have earlier tested positive for the virus.

That includes about three cases, which are proving especially puzzling to health teams and contact tracers.

With health teams yet to connect the dots between these 10 cases and others in the current outbreak, they are calling for residents from seven key suburbs to come forward and be tested whether or not they have symptoms.

Those suburbs are Mt Eden, Massey, Mangere, Favona, Papatoetoe, Otara and Manurewa.

The mystery Covid cases visited locations of interest in these suburbs and so officials now hope to test as many people in these areas to either pick up any hidden cases or rule out undetected transmission.

Director general of health Dr Ashley Bloomfield today said mobile testing units are heading into the suburbs to provide additional resources alongside community testing centres and doctors’ clinics.

That meant there are now more than 20 community testing centres across the city operating alongside doctors’ clinics and 400 extra testing staff who had been trained in the past few weeks to help.

The initial response to calls for more testing had gone well, Bloomfield said.

“We are seeing really good testing rates out in the community,” he said.

People who do not have symptoms and get a one-off Covid-19 test for surveillance purposes do not need to isolate while they wait for the result.

Ten unlinked cases

Bloomfield today announced there were 15 new Covid community cases, but that all had been linked back to other people known to have caught the virus.

That meant there were 10 unlinked cases from the past 14 days – cases that are yet to be linked back to an earlier positive case.

Out of the unlinked cases, Prime Minister Jacinda Ardern yesterday said just a handful are still causing headaches.

“There’s really only three or four that we discussed in a lot of detail because there’s not really an early hint of what’s happened,” she said.

That led health teams to name the five suburbs as focus suburbs for “surveillance testing” in a bid to try and determine whether there were any undetected chains of transmission.

What we know about the mystery cases

There are eight epidemiologically linked sub-clusters in the current outbreak – the two largest sub-clusters are the Māngere church group (381) and the Birkdale social network cluster (76). Nine sub-clusters are not epidemiologically linked.

However, Bloomfield revealed that the most concerning mystery cases seem to be confined to the three remaining groups, where community transmission is still suspected.

One of the groups has 51 cases and last had a case on September 8, which showed it was “clearly slowing down”, he said.

One has 28 cases and is a group of households in Mangere and Manurewa; the last case was from September 10. Prime Minister Jacinda Ardern said this group has a number of close contacts, so more cases are expected.

And one has 164 cases, which are broadly people who caught the virus from those connected to the church service in Mangere a month ago; the last cases were also from September 10. Some in this group caught the virus in a workplace.

“We’re picking up mystery cases and eventually sometimes linking them to these [three groups],” Ardern earlier said.

“That just gives us a bit of a sense that we may not have completely got that ring around it.”

Among these mystery cases are a handful of more concerning cases.

That includes two Mt Eden flatmates where there appears to be a missing link in the transmission of Covid between them, suggesting it’s possible there is another person connected to them who also has Covid.

Other concerning mystery cases relate to those who visited Middlemore Hospital for treatment and later tested positive for Covid.

In good news, however, there have been no new mystery cases in each of the last two days.

The number of unlinked cases has also been cut by seven today, going down from 17 yesterday to 10 today.


Massey locations of interest relate to a succession of shopping trips made at the end of August and start of this month.

They include local supermarket the NorthWest Shopping Centre and Countdown on September 3, West Liquor Royal Heights on September 1, and Tasi Market on August 28 and 29.

Mt Eden

Mt Eden’s single location of interest is the Galaxie Dairy Mt Eden on September 4.


Favona locations of interest also date back to the start of the month with two trips, one to the Mobil Walmsley Rd on August 27 and the Ponderosa Dairy Favona on September 1.


Mangere’s most recent exposure event took place as recently as Saturday September 11 at Mangere Pharmacy, with another event occurring on September 9 at Countdown Mangere East.

Other events took places on September 7 at Mascot Dairy Mangere and on September 6 at Unichem Mangere East.

There are three locations of interest from September 5 at Pak’nSave Mangere, Orly Avenue Superette and GAS Mascott Ave as well as two on September 1 at Unichem Pharmacy Mangere East and Countdown Auckland Airport.

Countdown Auckland Airport also had an exposure event on August 30, while on August 29 there were exposures at Countdown Mangere East and Pak’nSave Mangere.

There are also five locations of interest from August 28, including GAS Mascot Ave, two trips on Public Bus 325 Mangere East to Mangere Town Hall, Fresh Choice Mangere Bridge and Mojo’s Superette Mangere Bridge.


Papatoetoe locations of interest date right from the start of the month through to the latest location of interest exposure event taking place four days ago.

That latest exposure occurred at Portage Rd Superette on September 10 with another three exposures happening on September 5 at Countdown Papatoetoe, Dayspring Laundromat Papatoetoe and Skinny Handy Dairy Papatoetoe.

Three exposure events also happened a day earlier on September 4 at Bargain Chemist on Cavendish Drive and twice at Snowhite & Bone-Dry Laundromat.

Other locations of interest date to September 3 at Vege Oasis Papatoetoe, September 2 at the ASB ATM next to Countdown Papatoetoe Supermarket, and twice on August 30 at Kevin’s Laundromat Papatoetoe.

The final locations of interest are New World Papatoetoe and Chemist Warehouse Ronwood Centre on August 29 and Countdown Papatoetoe on August 28.


The most recent exposures in Otara took place last week on September 8 at Pacifica Laundry Otara and Otara Mini Supermarket.

There was another exposure at Pacifica Laundry Otara a day earlier on September 7 as well as one at Clyde Rd Superette.

There were two more exposure events on September 4 at Clyde Rd Superette and SupaSave Supermarket and two also on September 3 both at Otara Mini Supermarket.


Manurewa took place on September 9, including twice at Countdown Manurewa as well as at Clendon Pharmacy and Chatters Laundromat.

Five exposures took place on September 7,including twice at Countdown Manurewa as well as New World Southmall, Burbank Convenience and Lotto Manurewa, Z Manurewa and Pacific Fresh Clendon Park.

There were also exposure events earlier at Z Manurewa on September 4, Countdown Manurewa on September 1 and Round the Clock Superette on August 29.

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