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  2. Seroconversion - Wikipedia

    en.wikipedia.org/wiki/Seroconversion

    Due to the possibility of false positives, positive test results are usually reported as "reactive." This indicates that the assay reacted to antibodies, but this does not mean that the individual has the specific antibodies tested for. [5] Seroreversion is the opposite of seroconversion.

  3. Hepatitis C - Wikipedia

    en.wikipedia.org/wiki/Hepatitis_C

    There are several diagnostic tests for hepatitis C, including HCV antibody enzyme immunoassay (ELISA), recombinant immunoblot assay, and quantitative HCV RNA polymerase chain reaction (PCR). [16] HCV RNA can be detected by PCR typically one to two weeks after infection. In contrast, antibodies can take substantially longer to form and thus be ...

  4. You can still be contagious with COVID if you have a negative ...

    www.aol.com/news/still-contagious-covid-negative...

    If you get two negative at-home COVID test results 48 hours apart after previously testing positive, you are likely no longer contagious. But how long that will take is "wholly dependent on the ...

  5. COVID-19 testing - Wikipedia

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

    The US CDC's COVID-19 laboratory test kit. COVID-19 testing involves analyzing samples to assess the current or past presence of SARS-CoV-2, the virus that cases COVID-19 and is responsible for the COVID-19 pandemic. The two main types of tests detect either the presence of the virus or antibodies produced in response to infection.

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

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

    Many COVID-19 tests last for just a year or so, but the odds are high that you’ll need to use your test at some point. That may or may not be before the expiration date stamped on your package ...

  7. 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.

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