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

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

   In the most basic sense, there are four possible outcomes for a COVID-19 test, whether it’s molecular PCR or rapid antigen: true positive, true negative, false positive, and false negative.

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...

   The false-positive rate for a PCR test is close to zero, though. ... If you test negative for COVID-19 but you're having symptoms of the virus, Russo recommends either getting a PCR test or using ...

5. COVID-19 testing - Wikipedia

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

   Test errors can be false positives (the test is positive, but the virus is not present) or false negatives, (the test is negative, but the virus is present). [179] In a study of over 900,000 rapid antigen tests, false positives were found to occur at a rate of 0.05% or 1 in 2000.

6. Viral disease testing - Wikipedia

   en.wikipedia.org/wiki/Viral_disease_testing

   Antigen tests can be analyzed within a few minutes. Antigen tests are less accurate than PCR tests. It has a low false positive rate, but a higher false negative rate. A negative test result may require confirmation with a PCR test. [8] Advocates claim that antigen tests are less expensive and can be scaled up more rapidly than PCR tests. [8]

7. False positives and false negatives - Wikipedia

   en.wikipedia.org/wiki/False_positives_and_false...

   The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.

8. Got a Faint Line on a COVID-19 Home Test? Here's What ... - AOL

   www.aol.com/got-faint-line-covid-19-145700240.html

   Meaning, the darkness and rigidity of the positive line result on your test may be linked to how sick you currently are, a single indicator of how you are progressing in a COVID-19 illness (more ...

9. 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]