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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. Romberg's test - Wikipedia

   en.wikipedia.org/wiki/Romberg's_test

   Romberg's test, Romberg's sign, or the Romberg maneuver is a test used in an exam of neurological function for balance. The exam is based on the premise that a person requires at least two of the three following senses to maintain balance while standing: proprioception (the ability to know one's body position in space)

4. Does a Faint Line on a COVID Test Mean You Have COVID? - AOL

   www.aol.com/does-faint-line-covid-test-130000248...

   Doctors generally agree that this means you have COVID-19. “A faint line on a COVID test means the test is positive,” says infectious disease expert Amesh A. Adalja, M.D., a senior scholar at ...

5. 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.

6. 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]

7. 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]

8. Why you have COVID symptoms and a negative test: You ... - AOL

   www.aol.com/finance/why-covid-symptoms-negative...

   A negative means you aren’t able to, and positive means you are able to. They can’t tell you for certain whether or not you have, or had, COVID, according to Adalja.

9. Romberg test - Wikipedia

   en.wikipedia.org/?title=Romberg_test&redirect=no

   This page was last edited on 8 October 2008, at 12:02 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...