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  2. What Really Causes a False Positive COVID-19 Test? Experts ...

    www.aol.com/false-positive-covid-19-test...

    False positive COVID-19 tests occur when you don’t have the novel coronavirus, but the test is positive. ... “these are pretty rare,” says Thomas Russo, M.D., a professor and the chief of ...

  3. Are False Positive Covid Tests Common? Doctors Explain. - AOL

    www.aol.com/false-positive-covid-tests-common...

    A false positive Covid-19 test result can happen, but it’s rare, says Brian Labus, Ph.D., M.P.H., assistant professor at the University of Nevada Las Vegas School of Public Health.

  4. How common are false-positive COVID tests? Experts weigh in.

    www.aol.com/lifestyle/common-false-positive...

    False positives "can happen with any test" and, if someone tests positive for COVID-19 with a rapid test but does not have symptoms, he recommends following up with a PCR test to confirm that this ...

  5. COVID-19 rapid antigen test - Wikipedia

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

    COVID-19 rapid antigen tests (RATs) have been widely used for diagnosis of COVID-19. The World Health Organization (WHO) COVID-19 Case Definition states that a person with a positive RAT (also known as an antigen rapid diagnostic test or Antigen-RDT) can be considered a "confirmed case of SARS-CoV-2 infection" in two ways. [10]

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

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    But it’s not unheard of for people to test positive for longer than that on a rapid COVID-19 test, even up to 14 days, Stephen Kissler, Ph.D., an assistant professor of computer science at the ...

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

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

    Free at-home COVID-19 test from U.S. Federal government. By August, the overall ratio of positive to total tests was close to seven percent—well above the five percent the WHO considers to be the threshold for containment. [44] Trump has offered conflicting opinions about testing.

  8. Rapid antigen test - Wikipedia

    en.wikipedia.org/wiki/Rapid_antigen_test

    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.

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

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

    Nearly 90% of study participants also had high levels of the virus in their bodies for at least a day before they received a positive result on their home COVID-19 test, the researchers found.