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  2. COVID-19 testing - Wikipedia

    en.wikipedia.org/wiki/COVID-19_testing

    SARS-CoV-2 antigens can be detected before onset of COVID-19 symptoms (as soon as SARS-CoV-2 virus particles) with more rapid test results, but with less sensitivity than PCR tests for the virus. [57] COVID-19 rapid antigen tests are lateral flow immunoassays that detect the presence of a specific viral antigen, which indicates current viral ...

  3. The differences you need to know about PCR and rapid ... - AOL

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    The government is offering free COVID-19 testing kits to all Americans, many may have questions about how accurate these tests are. Both the PCR and Antigen tests can detect an active case of ...

  4. Reverse transcription polymerase chain reaction - Wikipedia

    en.wikipedia.org/wiki/Reverse_transcription...

    RT-PCR. Reverse transcription polymerase chain reaction (RT-PCR) is a laboratory technique combining reverse transcription of RNA into DNA (in this context called complementary DNA or cDNA) and amplification of specific DNA targets using polymerase chain reaction (PCR). [1] It is primarily used to measure the amount of a specific RNA.

  5. Why Some Experts Suggest Getting a PCR Test, Even If You ...

    www.aol.com/news/why-experts-suggest-getting-pcr...

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  6. Should You Use an Expired COVID Test? The Answer Might ... - AOL

    www.aol.com/lifestyle/expired-covid-tests-still...

    However, as the COVID-19 pandemic rapidly evolves and the scientific community’s understanding of the novel coronavirus develops, some of the information may have changed since it was last updated.

  7. COVID-19 testing in the United States - Wikipedia

    en.wikipedia.org/wiki/COVID-19_testing_in_the...

    Subtle but obvious errors were not CDC material such as "testing for Covid-19" (rather than for the virus that causes that illness). [51] In August 2020, the CDC lowered its recommendation for who should be tested, saying that people who have been exposed to the virus but are not showing symptoms "do not necessarily need a test".

  8. What should you do if you’re still testing positive for COVID ...

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    Experts are monitoring increases in COVID-19 cases in the U.S. driven by new, highly infectious variants.So take a moment to make sure you how and when to use at-home COVID tests to help you stay ...

  9. Polymerase chain reaction - Wikipedia

    en.wikipedia.org/wiki/Polymerase_chain_reaction

    A strip of eight PCR tubes, each containing a 100 μL reaction mixture Placing a strip of eight PCR tubes into a thermal cycler. The polymerase chain reaction (PCR) is a method widely used to make millions to billions of copies of a specific DNA sample rapidly, allowing scientists to amplify a very small sample of DNA (or a part of it) sufficiently to enable detailed study.