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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. 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 ...

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. ... household tests positive for COVID-19 with a rapid test and you're having symptoms of the virus, Adalja says, it's very likely ...

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. False positive rate - Wikipedia

   en.wikipedia.org/wiki/False_positive_rate

   The false positive rate (false alarm rate) is = + [1] where F P {\displaystyle \mathrm {FP} } is the number of false positives, T N {\displaystyle \mathrm {TN} } is the number of true negatives and N = F P + T N {\displaystyle N=\mathrm {FP} +\mathrm {TN} } is the total number of ground truth negatives.

8. 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 ...

9. Viral disease testing - Wikipedia

   en.wikipedia.org/wiki/Viral_disease_testing

   In May 2020, a rapid antigen test from Quidel Corporation received EUA for detecting SARS-CoV-2. [8] Test results were said to be available at point of care within 15 minutes. [9] Sensitivity is 85%. [1] Also in May 2020, a CRISPR genetic test was approved for emergency use that claimed 100% selectivity and 97.5% sensitivity. [10] That month ...