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  2. Are at-home COVID tests accurate? How can you get over ... - AOL

    www.aol.com/lifestyle/home-covid-tests-accurate...

    Dr. Amesh A. Adalja, infectious disease expert and senior scholar at the Johns Hopkins Center for Health Security, agrees, telling Yahoo Life, that these at-home tests are “very accurate” at ...

  3. Accuracy and precision - Wikipedia

    en.wikipedia.org/wiki/Accuracy_and_precision

    Accuracy is also used as a statistical measure of how well a binary classification test correctly identifies or excludes a condition. That is, the accuracy is the proportion of correct predictions (both true positives and true negatives) among the total number of cases examined. [10]

  4. Positive and negative predictive values - Wikipedia

    en.wikipedia.org/wiki/Positive_and_negative...

    The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.

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

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

    A scientific analysis published in The BMJ in 2021 notes that these tests “produce very few false positive results” and a lot of the accuracy surrounding them depends on factors like how well ...

  6. Sensitivity and specificity - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_and_specificity

    In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate). If 100 patients known to have a disease were tested, and 43 test positive, then the test has ...

  7. When should you test for COVID-19 for accurate results and ...

    www.aol.com/test-covid-19-accurate-results...

    With the holidays coming up, here’s a refresher on when to test for COVID-19.

  8. COVID-19 testing - Wikipedia

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

    The test is simpler and cheaper but less accurate than nucleic acid tests. It can be deployed in laboratories or at point of care and gives results in 15 minutes. [163] A false negative result occurs if the sample's antigen level is positive but below the test's detection limit, requiring confirmation with a nucleic acid test. [164]

  9. New COVID-19 test provides accurate results within 4 ... - AOL

    www.aol.com/news/covid-19-test-provides-accurate...

    The test is reportedly as accurate as a polymerase chain reaction (PCR) test. Using an electromechanical biosensor that analyzes genetic material from swabs, the molecular electromechanical system ...