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COVID-19 Testing Science

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Tests that determine if someone has an active COVID-19 infection fall into two categories: antigen tests, which are mostly used for rapid testing, and molecular PCR tests.

Molecular/PCR tests

Molecular PCR serves as the gold standard of COVID-19 diagnostic testing. Molecular tests detect genetic material – the RNA – of the coronavirus and are sensitive enough to need only a very tiny amount of it.

Until now, the best PCR tests generally required trained personnel, specific reagents and expensive machines. ‘Gold Standard PCR Tests’ like the ones used by Reliant Health Services / GetTestedNow.com are highly sensitive, highly specific and close to 100% accurate.

This test is able to pick up very small amounts of viral RNA very early in an infection, so there is a low chance for false negatives, including among pre-symptomatic and asymptomatic COVID-19 cases. PCR is considered the gold standard for many viruses we’ve seen in the past.

Antigen tests

Until now, the majority of rapid diagnostic tests have been antigen tests. They are taken with a nasal or throat swab and detect a protein that is part of the coronavirus. These tests are particularly useful for identifying a person who is at or near peak infection. Antigen tests are less expensive and generally faster. The downside is that they can be less accurate. That means, if a person is not near peak infection – but is still contagious – the tests may come back negative. Depending on the quality of the antigen test and the test takers, false negatives could be as high as 40%. Simply put, the coronavirus replicates itself by putting its genetic material inside our cells. If someone is tested at the stage when the virus is still replicating inside the cells, it has not produced sufficient protein or shed in large enough amounts to be detected yet by antigen testing.

The Centers for Disease Control and Prevention (CDC) has advised people who show COVID-19 symptoms but test negative with a rapid antigen test to get a PCR test to confirm the results.

Antigen tests can also produce false positives. The concern is false positives could be caused by the presence of other viruses, improper collection techniques, or other substances produced by the body during infection interfering with the results.

Antibody tests

These are not considered diagnostic tests that can determine if someone has an active COVID-19 infection. They use blood samples to look for antibodies produced by a person’s immune system to help fight off COVID-19. These can detect if someone had a past COVID-19 infection but not if they still are positive for the virus.[/vc_column_text][vc_column_text]

Reliant’s On-Site Lateral-flow Assay Antigen Test

The Clarity COVID-19 Antigen Rapid Test Cassette is a rapid chromatographic immunoassay intended for the qualitative detection of the nucleocapsid protein antigen from SARS-CoV-2 in nasopharyngeal swab and/or nasal swab specimens. The identification is based on the monoclonal antibodies specific for the Nucleocapsid (N) protein of SARS-CoV-2. It is intended to aid in the rapid differential diagnosis of COVID-19 infections within 5 days of symptom onset.

Product Facts:

  • Store the test kit as packaged between 2 ~ 30°C (36°F – 86°F).
  • The reagents and materials in the Clarity COVID-19 Antigen Test are stable until the expiration date printed on the outer packaging.
  • Do not use beyond the expiration date.
  • The test device must remain in the sealed pouch until use.
  • Do not freeze any contents of the kit.

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Reliant’s non-invasive PCR test for SARS-CoV-2

Saliva testing can allow earlier detection to identify people who may not know they are contagious. In addition, because patients spit into a tube or cup, saliva testing is safer for healthcare workers than taking swabs. The greatest scientific advantage is that nasal and oral swabs only collect the surface area where the swab goes, which may not be the place with most viral load. In contrast, the virus occurs throughout a saliva sample, so the test is more trustworthy.
Using saliva to test for viral infection was not something previously tried therefore was not an FDA approved testing option. Swabs had been the traditional approved standard. As testing exponentially accelerated supplies became limited and it became clear additional options needed to be discovered. A groundbreaking study done by Rutgers University determined saliva to be 100% equal to swabs for COVID-19 detection and in many cases, it proved to be a better, more sensitive option. This was further validated by an additional study done by Yale University researchers.
This delivered EUA approval for Rutgers to use saliva for SARS-CoV- 2 testing based on the very specific and documents protocols they used.
What makes the Saliva collection unique:
  • Engineered to reduce at-home user and self-collection errors
  • Preservation chemistry is 100% bacteriostatic extending sample shelf-life
  • Consistently delivers higher quality and quantities of DNA for medical, genetic, and molecular diagnostic testing
  • Protects and suspends viral RNA transcripts for sensitive and specific analysis
  • Chemistry inactivates the live virus helping to shield healthcare professionals and clinicians from exposure
  • Proven to stabilize & protect SARS-CoV-2 viral RNA during specimen transport in all extreme temperatures for 14 days

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CDC – COVID-19 Published Science and Research

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Here are a few articles regarding our PCR saliva testing info for review:

Yale Team Finds Saliva Compares Favorably to Nasopharyngeal Swabs for SARS-CoV-2 Testing

Saliva is more sensitive for SARS-CoV-2 detection in COVID-19 patients than nasopharyngeal swabs

Saliva samples preferable to deep nasal swabs for testing COVID-19[/vc_column_text][vc_separator][vc_column_text]

Related New Headlines

Risk of False Results with the Curative SARS-Cov-2 Test for COVID-19: FDA Safety Communication

If you’ve been exposed, are sick, or are caring for someone with COVID-19

Self-swabbing tests for COVID-19 accurate and safe, study reports

Proper Self-collection of Nasal Swabs Critical for Accurate COVID-19 Testing

OFFICE OF THE ASSISTANT SECRETARY FOR HEALTH – Nasal (Anterior Nasal) Specimen Collection for SARS-CoV-2 Diagnostic Testing[/vc_column_text][vc_separator][vc_column_text]

The following documents are provided to conform with applicable requirements set forth in the Act and FDA regulations.
For the Clarity Antigen Test:

Click here to view / download the Fact Sheet for Patients

Click here to view / download the Fact Sheet for Healthcare Providers

Click here to view / download the Emergency Use Authorization (EUA)[/vc_column_text][vc_single_image image=”46816″ img_size=”full” alignment=”center”][vc_column_text]

The following documents are provided to conform with applicable requirements set forth in the Act and FDA regulations.
For RT-PCR Test:

Click here to view / download the Fact Sheet for Patients

Click here to view / download the Fact Sheet for Healthcare Providers

Click here to view / download the Emergency Use Authorization (EUA)[/vc_column_text][vc_single_image image=”31090″ img_size=”full” alignment=”center”][vc_column_text]

The following documents are provided to conform with applicable requirements set forth in the Act and FDA regulations.
For the CareStart Antigen Test: WE NO LONGER PROVIDE THIS TEST.

Click here to view / download the Fact Sheet for Patients

Click here to view / download the Fact Sheet for Healthcare Providers

Click here to view / download the Emergency Use Authorization (EUA)[/vc_column_text][vc_single_image image=”31005″ img_size=”full” alignment=”center”][vc_column_text]

Reliant’s labs are:
  • Certified under Clinical Laboratory Improvement Amendments of 1988 (CLIA), 42 U.S.C. §263a and meet requirements to perform high-complexity tests
  • Accredited by the College of American Pathologists.
  • Meet the safety level of ‘Biosafety Level 3 (BSL-3),’ as specified by the CDC.

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