As Greater Sydney's COVID outbreak continues to worsen, calls are growing for Australia to introduce rapid antigen testing in an effort to keep pace with the virus, and curb the spread of the highly infectious Delta variant.
An antigen test, also known as a rapid test, is a faster, cheaper but less effective way to help determine who has COVID.
Rapid tests are available across Europe, the United Kingdom and the United States, where they can bought at supermarkets, pharmacies and even petrol stations.
A study led by Oxford University found Rapid Tests can be up to 95 per cent accurate for symptomatic cases.
But that rate drops to less than 60 per cent for people showing no symptoms.
Australian pathologists, though, believe its true accuracy is actually much lower.
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