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  2. Some at-home COVID tests have expiration dates changed ... - AOL

    www.aol.com/home-covid-tests-expiration-dates...

    The FDA doesn’t recommend using expired COVID at-home tests that do not have an expiration date extension. “COVID-19 tests and the parts they are made of may degrade, or break down, over time ...

  3. What Really Causes a False Positive COVID-19 Test? Experts ...

    www.aol.com/false-positive-covid-19-test...

    The government program that mailed free COVID-19 test kits to Americans came to an end when the CDC announced the end of the public health emergency in May 2023. But an iteration is coming back ...

  4. A Lingering COVID Cough Is Actually A Sign That Your Lungs ...

    www.aol.com/lingering-covid-cough-actually-sign...

    Coughing is a common symptom of COVID-19, but sometimes it lingers even after the infection clears up. ... 20 days and resolution of fever for at least 24 hours,” Dr. Leykum says. “After that ...

  5. Symptoms of COVID-19 - Wikipedia

    en.wikipedia.org/wiki/Symptoms_of_COVID-19

    However, the absence of the symptom itself at an initial screening does not rule out COVID-19. Fever in the first week of a COVID-19 infection is part of the body's natural immune response; however in severe cases, if the infections develop into a cytokine storm the fever is counterproductive. As of September 2020, little research had focused ...

  6. COVID-19 testing - Wikipedia

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

    COVID-19 Antigen Rapid Test Kit; the timer is provided by the user. Mucus from nose or throat in a test liquid is placed onto a COVID-19 rapid antigen diagnostic test device. COVID-19 rapid testing in Rwanda. An antigen is the part of a pathogen that elicits an immune response. Antigen tests look for antigen proteins from the viral surface.

  7. How long does COVID last? Here’s when experts say you'll ...

    www.aol.com/long-does-covid-last-experts...

    At the onset of symptoms, people infected with COVID-19 will begin to experience a general feeling of malaise, followed by fever, runny nose, sore throat, cough and headaches, Culler says.

  8. Is your cough a sign of coronavirus? An experts weighs in - AOL

    www.aol.com/cough-sign-coronavirus-experts...

    Like many during the coronavirus pandemic — which has made more than nine million people sick, and killed at least 469,000 worldwide, the New York Times reported Monday night — I’ve been ...

  9. Lateral flow test - Wikipedia

    en.wikipedia.org/wiki/Lateral_flow_test

    A NASA illustration of a lateral flow assay. A lateral flow test (LFT), [1] is an assay also known as a lateral flow immunochromatographic test (ICT), or rapid test.It is a simple device intended to detect the presence of a target substance in a liquid sample without the need for specialized and costly equipment.

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