Understanding the Benefits and Limitations of Rapid Antigen Tests

Rapid antigen tests are diagnostic tests that detect specific viral or bacterial antigens in clinical samples, providing quick results and aiding in the rapid diagnosis of infectious diseases.
Category
Diagnostic Test
Where to get
Commonly used in healthcare settings, point-of-care facilities, and community screening programs.
Applicable for
Infectious Diseases | Screening
Prepared by Shruti Sahoo, reviewed by Dr. Eugene Smith

Rapid Antigen Tests FAQ


Image credit: remotemedical.com

What does a rapid antigen test detect?

Rapid antigen tests detect proteins made by SARS-CoV-2, known as antigens. The tests generally detect these antigens the same way our immune systems do — with antibodies that have been designed and manufactured for this purpose. Most antigen tests target a protein called the nucleocapsid protein (N protein). Some target the spike protein.

When should I use a rapid antigen test?

However, the accuracy of rapid antigen tests improve if you do them when you have symptoms or within seven days of a potential exposure. Why use one? Rapid antigen tests are useful if you want to quickly check whether you have COVID-19.

What do rapid antigen tests look like?

Rapid antigen tests look a bit like pregnancy tests. Shutterstock These tips come from analysing instructions on the TGA website about how to use approved rapid antigen tests.

What is a rapid antigen test (RAT)?

What is a Rapid Antigen Test (RAT) and when do you complete one. The rapid antigen test (RAT) is a quick test to check for COVID-19 and provides a result within 15 to 30 minutes. All test kits have a QR code which links to a video that shows how to take a test. RAT kits are available for purchase from supermarkets, pharmacies and other retailers.

Are rapid antigen tests reliable?

The rapid antigen tests are not as reliable when used to screen asymptomatic persons and can generate false negative or false positive results particularly in low prevalence disease settings. Different state and territory jurisdictions may have differing testing and reporting requirements based on their public health orders.

Where can I get rapid antigen tests?

You can get rapid antigen tests (RATs) online or at pharmacies and retail outlets. You can take these tests at home. Only use tests that have been approved by the Therapeutic Goods Administration (TGA). See the TGA’s list of approved tests here, including links to videos on how to use each test. This list is updated regularly.

Rapid Antigen Tests References

If you want to know more about Rapid Antigen Tests, consider exploring links below:

What Is Rapid Antigen Tests

  1. https://www.nsw.gov.au/covid-19/testing-managing/rapid-antigen-tests-for-covid-19
  2. https://www.abc.net.au/news/2021-07-29/what-is-a-rapid-antigen-test-nsw-covid-schools/100331220
  3. https://www.tga.gov.au/products/covid-19/covid-19-tests/covid-19-rapid-antigen-self-tests-home-use/covid-19-rapid-antigen-self-tests-are-approved-australia
  4. https://healthcheck.griffith.edu.au/rapid-antigen-test/
  5. https://en.wikipedia.org/wiki/COVID-19_rapid_antigen_test
  6. https://www.health.gov.au/news/rapid-antigen-tests
  7. https://www.sbs.com.au/news/article/everything-you-need-to-know-about-rapid-antigen-tests-and-which-ones-are-most-accurate/y6976l5l9

Rapid Antigen Tests Information

  1. https://www.fairwork.gov.au/find-help-for/covid-19-and-workplace-laws/covid-19-testing/rapid-antigen-testing
  2. https://www.healthdirect.gov.au/covid-19/testing

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