February 21 2022
PM Jacinda Ardern has provided details on the conditions under which vaccination mandates could be eased as protests continue around Parliament's grounds.
One in five Covid-19 tests taken in Dunedin is returning a positive result, a rate which has shocked epidemiologist Professor Michael Baker.
"I don't know if it's a national record but those are very high rates," Baker, of the University of Otago, said.
Overall, across Otago and Southland the positivity rate — the percentage of Covid-19 tests returning a confirmed diagnosis of the disease — sits at 16.5 per cent.
Baker said a positivity rate of 5 per cent was regarded by the World Health Organisation as being likely to show that an epidemic was under control, and that yesterday the national positivity rate had just passed 10 per cent.
The southern figures — and especially the Dunedin positivity rate of 21.6 per cent — were very high, Baker said.
"That suggests a widespread outbreak and suggests that if you did more testing you would find a lot more cases."
The high southern positivity rate emphasised the urgent need for anyone who had not been vaccinated or who had not received a booster jab to get one, Baker said.
"This would have been devastating without vaccination ... I'm still amazed at the million or so New Zealanders who have the option to get a booster and still haven't done so.
"This is a very serious illness which may not kill you but which can certainly make you miserable for several days."
Queenstown, the other centre in the South with major numbers of cases in the current outbreak, had a positivity rate of 10.5 per cent, Southern District Health Board medical officer of health Dr Susan Jack said, while the Invercargill rate was 6.6 per cent.
Southern District Health Board medical officer of health Dr Susan Jack. Photo / Peter McIntosh, File
"If people have been in contact with a known case and have symptoms, please assume you have Covid and isolate even if your test result has not come through yet," Jack said.
Testing facilities and the laboratories processing those swabs have been under severe pressure throughout the region this week, and on Tuesday almost 2800 tests were taken.
That had led to delays in processing results, some people having been told they might need to wait five days to learn if they had Covid-19.
On Tuesday, the Southern region began more widespread use of rapid antigen tests, which Jack said should ease pressure on laboratories.
"There has been a delay in getting out some results of up to three days but generally results are coming through within two-and-a-half days.
"If you test positive on a RAT test you do not need to have that confirmed by PCR — you are a case."
The high positivity rate was further demonstrated by the record 455 new cases reported in the southern district yesterday.
More schools in the region reported cases, including Taieri College and St Hilda's.
On Tuesday, the Southern District Health Board revealed that case numbers in Otago and Southland were likely to be twice as many as officially released because people registered to GPs in other regions were being counted in other provincial tallies.
In response yesterday, after research by SDHB staff, the Ministry of Health reclassified hundreds of cases reported as being elsewhere but actually being people in southern.
That, on top of new positive tests, accounted for the large hike in Covid numbers locally.
"It is important to note that a case undercount anywhere in the country does not significantly impact our assessment of the outbreak, public health decision-making or public health advice," a ministry spokesman said.
"With Omicron spreading quickly in New Zealand, people shouldn't rely on case numbers to take action to prevent them both catching and spreading Covid-19."
Of the 455 cases announced yesterday, 136 were in locations yet to be confirmed, but 233 were in Dunedin, which had a total of 584 active cases.
Queenstown Lakes reported an additional 59 cases, and every region other than Southland also reported new cases.
Nationally, 3297 community cases of Covid-19 were reported yesterday. There were 179 people were in hospital with the disease, although none of those cases were in the southern region.
Current cases
Southern District Total new: 455 Total active: 1145
