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  2. Heterophile antibody test - Wikipedia

    en.wikipedia.org/wiki/Heterophile_antibody_test

    One source states that the specificity of the test is high, virtually 100%, [7] Another source states that a number of other conditions can cause false positives. [5] Rarely, however, a false positive heterophile antibody test may result from systemic lupus erythematosus, toxoplasmosis, rubella, lymphoma and leukemia.

  3. Heterophile antibody - Wikipedia

    en.wikipedia.org/wiki/Heterophile_antibody

    Heterophile antibodies can arise in non-EBV infections. False positive monospot tests may occur in cases of HIV, lymphoma, or systemic lupus erythematosus. Other assays for detection of EBV are available, including serologic markers. [7] An important clinical pearl for heterophile antibodies is they can also be seen in genetic immunodeficiencies.

  4. Cross-reactivity - Wikipedia

    en.wikipedia.org/wiki/Cross-reactivity

    Cross-reactivity, in a general sense, is the reactivity of an observed agent which initiates reactions outside the main reaction expected.This has implications for any kind of test or assay, including diagnostic tests in medicine, and can be a cause of false positives.

  5. FDA tightens rules on antibody tests after false claims ... - AOL

    www.aol.com/article/news/2020/05/04/fda-tightens...

    The Food and Drug Administration said it took the action because some sellers have made false claims about the tests and their accuracy. FDA tightens rules on antibody tests after false claims ...

  6. Hook effect - Wikipedia

    en.wikipedia.org/wiki/Hook_effect

    Since the antibodies do not bridge between antigens, no agglutination occurs. Because no agglutination occurs, the test is interpreted as negative. In this case, the result is a false negative. The range of relatively high antibody concentrations within which no reaction occurs is called the prozone. [5]

  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, says Brian Labus, Ph.D., M.P.H., assistant professor at the University of Nevada Las Vegas School of Public Health.

  8. 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.

  9. 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.