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2. What does a faint line on a rapid COVID-19 test mean? - AOL

   www.aol.com/faint-line-covid-19-test-225851470.html

   Don't read the test too early or too late, the experts say, because that may give you a false-negative or false-positive result. Only read your results within the time window that the COVID-19 ...

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

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

   What is a false positive COVID-19 test? ... The false positive rate on rapid antigen testing is rare. One study from 2022 estimated that 0.05% of positive tests were false positives.

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

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

   A false positive isn't as likely as a false negative result on a home test early in a person's infection, explains Sandra H. Bonat, M.D., a pediatric expert and virologist with VIP StarNetwork, a ...

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. 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.

7. 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, ... giving a false positive result,” explains. “The rapid tests have a sensitivity of over 99 percent, which means that false ...

8. COVID-19 testing - Wikipedia

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

   Accuracy is measured in terms of specificity and selectivity. 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. [180]

9. 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 ...