Shop Rapid Antigen Tests (RAT) Online at Blooms
Test and detect COVID-19 with our range of rapid antigen tests (RATs). These nasal tests provide quick and accurate results, which can help you make informed decisions about your health. Our selection includes various brands of COVID test kits, designed for ease of use and convenience.
What is a Rapid Antigen Test (RAT)?
A rapid antigen test, also known as a RAT COVID-19 test, is a screening tool used to detect specific proteins of the SARS-CoV-2 virus.
These tests typically provide results within 10-30 minutes, making them a convenient option for quick COVID-19 detection.
How do Rapid Antigen Tests (RAT) work?
Rapid Antigen Tests (RATs) work by detecting the presence of proteins of the coronavirus^. They can be used anywhere without supervision from a healthcare professional, and return a result between 10 to 20 minutes.
^HealthDirect, COVID-19 testing, accessed 2 May 2025
How accurate are Rapid Antigen Tests (RAT)?
Rapid Antigen Tests (RATs) are generally 80% or more accurate in detecting COVID-19. they're more accurate when you are experiencing symptoms, so it’s better to take the test in the first seven days of having symptoms^.
While you’re waiting for your results, you can put on a face mask if you’re going out or are near other people as a precautionary measure.
How do I perform a rapid antigen test?
To perform a rapid antigen test, carefully follow the instructions provided in your COVID test kit. These step-by-step instructions include a strong recommendation that you don’t eat, drink, smoke, brush your teeth, or chew your gum for 10 to 30 minutes before doing the RAT test.
Generally, the process involves collecting a nasal sample using a swab, mixing it with a solution, and applying it to a test cassette.
Always wash your hands before and after testing, and dispose of used materials properly.
What is the difference between a RAT test and a PCR test?
RATs (rapid antigen tests) provide quick results and are ideal for at-home use when you need an answer fast.
PCR tests are lab-based and more sensitive. PCR tests are able to detect even small amounts of the virus, making them a preferred option when accuracy is critical or symptoms are mild.
RATs may be less accurate, but are more accessible and are convenient when you want to test for COVID-19 in the comfort of your own home.
How many days until I test positive for COVID-19?
Getting a COVID test can help identify infection and reduce the spread of the virus to others. You are likely to test positive for COVID-19 between two to six days after exposure, although it may take up to 14 days (2).
If symptoms such as fever, cough, or fatigue develop, it’s a good idea to test, as symptoms may be associated with an active infection.
Taking a Rapid Antigen Test around 5 to 7 days after potential exposure or if symptoms appear is recommended for optimal results (2).
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Reference:
(1) Dinnes, J., Deeks, J. J., Berhane, S., Taylor-Phillips, S., Adriano, A., Davenport, C., Dittrich, S., Emperador, D., Takwoingi, Y., Cunningham, J., Beese, S., Dretzke, J., Ferrante di Ruffano, L., Harris, I. M., Price, M. J., Taylor-Phillips, S., Hooft, L., Leeflang, M. M. G., Spijker, R., ... & Cochrane COVID-19 Diagnostic Test Accuracy Group. (2021). Rapid, point-of-care antigen and molecular-based tests for diagnosis of SARS-CoV-2 infection. Cochrane Database of Systematic Reviews, (3), CD013705.
(2) Lauer, S. A., Grantz, K. H., Bi, Q., et al. (2020). The Incubation Period of Coronavirus Disease 2019 (COVID-19) From Publicly Reported Confirmed Cases: Estimation and Application. Annals of Internal Medicine, 172(9), 577–582.