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While most people will clear the virus and get a negative antigen test result within 10 days, some people may keep testing positive for longer than that, experts tell TODAY.com. And if you keep ...
If the test results show up very quickly and the line is very dark, it could indicate you have a great chance of transmitting the virus to others, he added. ... Most at-home tests are antigen ...
If you take an antigen test, which is an at-home test, a negative result may not always be accurate. “Positive results are very accurate and reliable,” the CDC said about antigen tests.
COVID-19 rapid antigen tests or RATs, also frequently called COVID-19 lateral flow tests or LFTs, are rapid antigen tests used to detect SARS-CoV-2 infection ().They are quick to implement with minimal training, cost a fraction of other forms of COVID-19 testing, and give users a result within 5–30 minutes.
If rapid antigen tests are stored in an environment that's too cold or too hot, they may give inaccurate results, including false negatives. And when you're ready to take the test, read the ...
Antigen tests produce results quickly (within approximately 15–30 minutes), and most can be used at the point-of-care or as self-tests. Self-tests are rapid tests that can be taken at home or anywhere, are easy to use, and produce rapid results. [58] Antigen tests can be performed on nasopharyngeal, nasal swab, or saliva specimens. [15]
A COVID-19 Rapid Antigen test(top) with a Covid-19 Rapid Antigen and a Influenza A&B Rapid Antigen Test(bottom) A rapid antigen test (RAT), sometimes called a rapid antigen detection test (RADT), antigen rapid test (ART), or loosely just a rapid test, is a rapid diagnostic test suitable for point-of-care testing that directly detects the presence or absence of an antigen.
As rapid antigen COVID-19 tests measure the presence of viral proteins, even a faint line positive result indicates that SARS-CoV-2 has had an impact on your immune system.