The Government has been quietly investigating whether returnees and border workers should use a phone app that can detect Covid-19 two or three days before symptoms set in.
Made in Auckland and dubbed "the future of healthcare" by epidemiologist Michael Baker, it is hoped ëlarm could plug gaps in the country's Covid response.
The app connects to "wearables" - such as a Fitbit or smartwatch - to look for the small physiological changes that happen at the early onset of an illness.
It can pick up on slight changes in heart rate, body temperature and respiratory rate before more obvious symptoms like coughing or fever show.
The app was dreamed up in March last year by an Auckland company called Datamine and developed using artificial intelligence and medical data from Covid-19 cases.
It has been listed on the Apple and Android app stores and accrued users in 23 countries - where Datamine's founder Paul O'Connor said it was proving increasingly effective with Covid-19.
"We've now got the ëlarm system to over 80 per cent accuracy in terms of detecting Covid-19 two to three days before somebody actually knows that they're sick," he said.
With each new user, O'Connor expected the system to keep learning, improving and becoming more accurate.
Ëlarm has caught the attention of officials here and the Ministry of Health confirmed it was in "active discussions" with Datamine about how it might be used in country's Covid-19 response.
Neither the ministry nor Datamine will divulge more details yet, but O'Connor said the app could be useful at the border, for workers or returnees.
"We have had discussions around people coming into the country using the ëlarm system. So having a wearable on and seeing if there are any changes when they're travelling or before they're travelling and then when they come into the country in managed isolation," he said.
Ëlarm also has also caught the interest of Baker, who said people pre-symptomatic for Covid-19 had proven particularly good at infecting others, which was the reason the virus had spread so quickly around the world.
Although ëlarm doesn't replace a Covid-19 test, Baker said finding a way to detect the virus early was important.
"So this has real potential."
He said the technology could be used to pick up when the virus was being transmitted between returnees in an MIQ hotel, or it could replace the daily health checks that nurses carry out.
Baker said every interaction, even a fleeting temperature check, carried some risk of infection.
"If, instead of doing that, you could issue everyone who's going through MIQ an app for their phone and a device that would continually monitor key indicators, or early indicators, of potential infection, that could be a great improvement."
Act Party leader David Seymour urged the Government to consider ëlarm in June last year.
He thought it could eventually replace the need for some low-risk returnees to complete managed isolation.
"In a post-vaccine Covid world, it might be appropriate to have a much wider range of people using this kind of technology from Datamine. It might be appropriate that all people visiting the country have to use it for a period of time after entering in substitution of quarantine, if they can also show they have an immunity effect and have come from a country with a very low-risk," he said.
Baker said beyond Covid-19, wearables technology like ëlarm might continue to prove valuable.
"This is the future of healthcare and early disease detection and possible even screening, that we make better use of the data that we can get, that we can harness, from other devices."
The Ministry of Health hoped it would be able to provide more details about any plans for ëlarm this month.