With a COVID-19 (SARS-CoV-2) response strategy based on strict local lockdowns at the onset of cases and an effective "test-trace-isolate" method, Australia and New Zealand were able to prevent the spread of the virus and safeguard the health of their populations with confidence.

The "test-trace-isolate" method aims to achieve a reduced or low incidence rate — ideally within a threshold of 10 cases per 100,000 inhabitants. For Australia and New Zealand, this objective was framed within a “zero-COVID” ambition. The approach combines an elimination strategy with a progressive neutralization of the virus. Broadly speaking, this method seeks to prevent any circulation of the virus within national borders by swiftly suppressing even the slightest resurgence of infection.

Naturally, this strategy involved closing borders to non-resident foreigners and imposing mandatory 14-day quarantines on all incoming travelers. Both Australia and New Zealand implemented these measures at the earliest stages of the pandemic with exemplary rigor. Furthermore, by deploying defense tools such as tracing technologies, these countries were able to track even those who attempted to bypass quarantine protocols. By promoting self-isolation in cases of infection, both states established a continuous system of testing for incoming travelers and foreigners, as well as mandatory daily testing for public servants and workers. All of these measures helped to strengthen the border health buffer of both countries, allowing for more flexible lockdowns and less stringent preventive measures for the general population.