COVID-19_testing
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. Molecular tests for viral presence through its molecular components are used to diagnose individual cases and to allow public health authorities to trace and contain outbreaks. Antibody tests (serology immunoassays) instead show whether someone once had the disease. They are less useful for diagnosing current infections because antibodies may not develop for weeks after infection. It is used to assess disease prevalence, which aids the estimation of the infection fatality rate.
Individual jurisdictions have adopted varied testing protocols, including whom to test, how often to test, analysis protocols, sample collection and the uses of test results. This variation has likely significantly impacted reported statistics, including case and test numbers, case fatality rates and case demographics. Because SARS-CoV-2 transmission occurs days after exposure (and before onset of symptoms), there is an urgent need for frequent surveillance and rapid availability of results.
Movies
Chemist Breaks Down How At-Home Covid Tests Work | WIRED
2022-02-28 17:00:06 UTC
Over the past two years, you've likely taken a Covid rapid antigen test. A unique, biochemical reaction involving saline, tiny ...
FLOWFLEX COVID 19 TEST INSTRUCTIONS
2022-01-05 15:54:01 UTC
Order your covid tests here https://bit.ly/3vDKUq7 Sign up for our discount club to save https://bit.ly/3y9BW5v Get fast test results in ...
How to use the iHealth COVID-19 Antigen Rapid Test
2021-11-05 19:34:50 UTC
Self-test at home. Results in 15 mins. Only $8.99 per test. Shop now at https://ihealthlabs.com/ Also available on Amazon: ...
How to take a Rapid COVID Test
2021-11-01 06:51:13 UTC
Rapid antigen testing kits are now available, allowing Australians to test themselves at home and find out in minutes if they have ...
How to use the BinaxNOW COVID-19 Antigen Self Test (step by step)
2021-08-10 11:33:31 UTC
We show each step for using the BinaxNOW shallow nasal swab self test which gives COVID-19 test results after 15 minutes.
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