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2. COVID-19 testing - Wikipedia

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

   COVID-19 testing. Scientifically accurate atomic model of the external structure of SARS-CoV-2. Each "ball" is an atom. COVID-19 testing involves analyzing samples to assess the current or past presence of SARS-CoV-2. The two main types of tests detect either the presence of the virus or antibodies produced in response to infection.

3. How Long Before Someone With COVID-19 Isn't Contagious?

   www.healthline.com/health-news/how-long-before...

   Trusted Source. seems to occur 2 days prior to symptom onset to 3 days after symptom onset. Rapid antigen tests can detect high viral loads and are currently thought to be reliable in telling ...

4. Coronavirus: Diagnosis and Testing of COVID-19 - Healthline

   www.healthline.com/health/coronavirus-diagnosis

   The bottom line. RT-PCR testing remains the primary method for diagnosing COVID-19 in the United States. However, some clinicians may utilize chest CT scans as a simpler, quicker, and more ...

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

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

   February 2020. In February, the U.S. CDC produced 160,000 SARS-CoV-2 tests, but soon it was discovered that many were defective and gave inaccurate readings. [7] [8] On February 19, the first U.S. patient with COVID-19 of unknown origin (a possible indication of community transmission) was hospitalized. The patient's test was delayed for four ...

6. Coronavirus (COVID-19) Testing - WebMD

   www.webmd.com/covid/coronavirus-testing

   This molecular COVID-19 test requires you to buy a separate device to read your results. Lucira Health. If you have respiratory symptoms, this company makes a test that can check for COVID, as ...

7. Types of COVID Tests: Procedure, Accuracy, Results & Cost

   www.healthline.com/health/types-of-covid-tests

   The Families First Coronavirus Response Act (FFCRA) currently ensures access to free testing for COVID-19, regardless of insurance status. This includes molecular tests. This includes molecular tests.

8. Coronavirus and COVID-19: What You Should Know - WebMD

   www.webmd.com/covid/coronavirus

   Loss of smell or taste. Nausea. Diarrhea. The virus can lead to pneumonia, respiratory failure, heart problems, liver problems, septic shock, and death. Many COVID-19 complications may be caused ...

9. COVID-19 rapid antigen test - Wikipedia

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

   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] First, the person with a positive Antigen-RDT could meet a "probable case definition" such as having ...