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

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

    However, as the COVID-19 pandemic rapidly evolves and the scientific community’s understanding of the novel coronavirus develops, some of the information may have changed since it was last updated.

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

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

    Keep in mind that these symptoms can overlap with the ones associated with other viral respiratory infections, such as the flu, “so patients should have a low threshold to test for COVID-19 if ...

  4. The best FDA-approved at-home COVID tests - AOL

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

    Best at-home COVID test for fast results QuickVue At-Home OTC COVID-19 Test. More options. ... Antigen tests, on the other hand, also offer nearly as accurate results within 10-30 minutes.

  5. 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.

  6. COVID-19 testing in the United States - Wikipedia

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

    The first COVID-19 cases in the U.S. and South Korea were identified at around the same time. [21] Critics say the U.S. government has botched the approval and distribution of test kits, losing crucial time during the early weeks of the outbreak, with the result that the true number of cases in the United States was impossible to estimate with ...

  7. COVID-19 rapid antigen test - Wikipedia

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

    COVID-19 rapid antigen tests or RATs, also frequently called COVID-19 lateral flow tests or LFTs, are rapid antigen tests used to detect SARS-CoV-2 infection . They are quick to implement with minimal training, cost a fraction of other forms of COVID-19 testing , and give users a result within 5–30 minutes.

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

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

    A new portable test that detects coronavirus infection within a four-minute window has been developed by scientists in Shanghai. The test is reportedly as accurate as a polymerase chain reaction ...

  9. Sensitivity and specificity - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_and_specificity

    For the figure that shows high sensitivity and low specificity, there are 3 FN and 8 FP. Using the fact that positive results = true positives (TP) + FP, we get TP = positive results - FP, or TP = 40 - 8 = 32. The number of sick people in the data set is equal to TP + FN, or 32 + 3 = 35. The sensitivity is therefore 32 / 35 = 91.4%.