What is an antigen test? Thanks for asking!

Antigen tests are a rapid way of diagnosing a person with a medical condition. Common examples include tests for the flu, pregnancy and of course COVID-19. Antigen tests use antibodies to identify antigens in the body. The aim of a COVID-19 antigen test is the same as with the more common PCR test. That is to say, whether a person is infected at the moment of testing. There are several advantages to this method, but also some important drawbacks.

So what’s the difference between an antigen test and a PCR test then?

Both these forms of diagnostic testing are carried out by collecting a fluid sample through a nasal swab. But antigen tests differ from PCR tests in that certain proteins from the virus are detected, rather than its genetic material. Meanwhile, the serology test detects antibodies from a blood sample. Antigen test results can be delivered within 30 minutes. That’s much quicker than with PCR tests, which have to be processed in laboratories. Healthcare professionals believe this quicker turnaround will help to break down transmission chains.

Are antigen tests the best solution to improve the current COVID-19 testing times? In under 3 minutes, we answer your questions!

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