Testing, tracking and tracing have all proved crucial in New Zealand's fight to eliminate the virus.
But to keep it out, we're likely to need a fourth tool - technology.
As Kiwis enjoy their first weekend of relative freedom under alert level 3, it seems there's one small detail not all of us doing - keeping a daily record of where you've been and who you've been in contact with.
It may be easy now, but what about under level 2 when our scope widens?
The Prime Minister has asked that we take notes of where we've been and who we've seen. But while we're going old school, other countries already have apps that do it for you - including Australia.
"It is important that you download the COVIDSafe app," says Australian Prime Minister Scott Morrison.
"That is your ticket, that is Australia's ticket to a COVID-safe Australia."
Already more than 3.5 million have and the government there is pushing hard for more to follow.
The app involves phones talking to each other, using Bluetooth, pinging signals to anyone else's mobile phone they've come close to.
Tech giant rivals Apple and Google have combined forces to offer a framework for individual governments' apps.
New Zealand is working on its own version. But not everyone's keen.
"No, yeah, it's a slippery slope," one person told Newshub.
"I don't want just anybody having access to my personal information and I think it is kind of creepy for complete strangers to know where you've been all the time."
The Ministry of Health says any data held would "not be used for other purposes" and only "with the permission of the user when they test positive or if they are a close contact".
It's still undergoing further development - as is our return to normal life.