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2. 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.

3. Rapid antigen test - Wikipedia

   en.wikipedia.org/wiki/Rapid_antigen_test

   A COVID-19 Rapid Antigen test(top) with a Covid-19 Rapid Antigen and a Influenza A&B Rapid Antigen Test(bottom) A rapid antigen test (RAT), sometimes called a rapid antigen detection test (RADT), antigen rapid test (ART), or loosely just a rapid test, is a rapid diagnostic test suitable for point-of-care testing that directly detects the presence or absence of an antigen.

4. COVID-19 - Wikipedia

   en.wikipedia.org/wiki/COVID-19

   Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic . The symptoms of COVID‑19 can vary but often include fever, [ 7 ] fatigue, cough, breathing difficulties , loss of smell , and loss of taste .

5. What does a faint line on a rapid COVID-19 test mean? - AOL

   www.aol.com/faint-line-covid-19-test-225851470.html

   However, people who've had COVID-19 may continue to test positive on PCR tests for up to 90 days, so it may be difficult to use a PCR test to diagnose a new coronavirus infection.

6. COVID-19 rapid antigen test - Wikipedia

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

   COVID-19 rapid antigen tests (RATs) have been widely used for diagnosis of COVID-19. The World Health Organization (WHO) COVID-19 Case Definition states that a person with a positive RAT (also known as an antigen rapid diagnostic test or Antigen-RDT) can be considered a "confirmed case of SARS-CoV-2 infection" in two ways. [10]

7. Bronchoalveolar lavage - Wikipedia

   en.wikipedia.org/wiki/Bronchoalveolar_lavage

   Bronchoalveolar lavage (BAL), also known as bronchoalveolar washing, is a diagnostic method of the lower respiratory system in which a bronchoscope is passed through the mouth or nose into an appropriate airway in the lungs, with a measured amount of fluid introduced and then collected for examination.

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

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

   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.

9. Pneumonia - Wikipedia

   en.wikipedia.org/wiki/Pneumonia

   Bacterial and viral cases of pneumonia usually result in similar symptoms. [25] Some causes are associated with classic, but non-specific, clinical characteristics. Pneumonia caused by Legionella may occur with abdominal pain, diarrhea, or confusion. [26] Pneumonia caused by Streptococcus pneumoniae is associated with rusty colored sputum. [27]