There are no new community cases of Covid-19 today. There are two cases in managed isolation.
There are now 95 active cases in New Zealand, the Ministry of Health said in a statement.
The two new cases at the border are from Kiwis who travelled here from India and the United States.
Both tested positive for the infection after day zero routine swabs.
Today the ministry reported that four wastewater testing samples — three from a site linked to Papatoetoe and one from a wider wastewater collection point, which includes Papatoetoe — last night returned negative results for Covid detection.
This followed a weak positive test result detected on Friday in routine wastewater sampling at the site linked to Papatoetoe, which has been assessed as not posing a risk to the community.
The ministry said the most likely explanation for the weak positive detection was continued shedding of the virus from those who had recovered from Covid in the February cluster who had returned home from the Auckland quarantine facility.
"We know that people who have recently had Covid-19 may continue to shed fragments of the virus for some weeks after they have recovered, without being infectious to others. Wastewater sampling can detect these fragments, which are not infectious and their presence is not considered a risk to the community," said the ministry.
This was supported by results from geospatial mapping linking the homes and residential addresses of the individuals to the catchment area where the sample was taken, the ministry said. The new negative wastewater testing results also provided good evidence to support this.
"The recovered cases are no longer infectious and there is no evidence that the wastewater is infectious," the ministry said.
The health ministry also sounded a word of warning about the low number of tests being carried out in the community. On Monday, 2,822 tests were processed.
"It's important testing levels in the community remain high so we continue to have confidence in our surveillance and detection," said the ministry.
By yesterday, New Zealand had enjoyed 15 days straight with no new community cases after 15 people were infected in February's Valentine's Day outbreak.
The last infection in the cluster to emerge was on February 28, with the person in Auckland's quarantine facility when it started spreading among their household.
Thanks to a week-long alert level 3 lockdown across Auckland, the cluster was limited to four Papatoetoe families.
There has since been a border-related Covid case involving an Air New Zealand flight attendant but tests from three household close contacts and 14 cabin crew have returned negative.
